FR2679226A1 - FIBER MOLDED BODY AND PROCESS FOR PREPARING SAME AND THE USE OF THE MOLDED BODY FOR PREPARING FIBER REINFORCED ALUMINUM FOUNDRY PARTS. - Google Patents

FIBER MOLDED BODY AND PROCESS FOR PREPARING SAME AND THE USE OF THE MOLDED BODY FOR PREPARING FIBER REINFORCED ALUMINUM FOUNDRY PARTS. Download PDF

Info

Publication number
FR2679226A1
FR2679226A1 FR9204942A FR9204942A FR2679226A1 FR 2679226 A1 FR2679226 A1 FR 2679226A1 FR 9204942 A FR9204942 A FR 9204942A FR 9204942 A FR9204942 A FR 9204942A FR 2679226 A1 FR2679226 A1 FR 2679226A1
Authority
FR
France
Prior art keywords
fibers
molded body
short
molded
fiber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
FR9204942A
Other languages
French (fr)
Inventor
Penkava Dr Josef
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vereinigte Aluminium Werke AG
Vaw Aluminium AG
Original Assignee
Vereinigte Aluminium Werke AG
Vaw Aluminium AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vereinigte Aluminium Werke AG, Vaw Aluminium AG filed Critical Vereinigte Aluminium Werke AG
Publication of FR2679226A1 publication Critical patent/FR2679226A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209—Inorganic fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B18/00—Layered products essentially comprising ceramics, e.g. refractory products
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B30/00—Compositions for artificial stone, not containing binders
    • C04B30/02—Compositions for artificial stone, not containing binders containing fibrous materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/111—Fine ceramics
    • C04B35/117—Composites
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/14—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silica
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
    • C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/6303—Inorganic additives
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/6303—Inorganic additives
    • C04B35/6316—Binders based on silicon compounds
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C04B35/636—Polysaccharides or derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/71—Ceramic products containing macroscopic reinforcing agents
    • C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
    • C04B35/80—Fibres, filaments, whiskers, platelets, or the like
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
    • C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
    • C22C49/04—Light metals
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209—Inorganic fibres
    • D04H1/4242—Carbon fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/587—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives characterised by the bonding agents used
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/64—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
    • D04H1/655—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions characterised by the apparatus for applying bonding agents
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00905—Uses not provided for elsewhere in C04B2111/00 as preforms
    • C04B2111/00913—Uses not provided for elsewhere in C04B2111/00 as preforms as ceramic preforms for the fabrication of metal matrix comp, e.g. cermets
    • C04B2111/00931—Coated or infiltrated preforms, e.g. with molten metal
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/52—Constituents or additives characterised by their shapes
    • C04B2235/5208—Fibers
    • C04B2235/5216—Inorganic
    • C04B2235/522—Oxidic
    • C04B2235/5224—Alumina or aluminates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/52—Constituents or additives characterised by their shapes
    • C04B2235/5208—Fibers
    • C04B2235/5216—Inorganic
    • C04B2235/522—Oxidic
    • C04B2235/5228—Silica and alumina, including aluminosilicates, e.g. mullite
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/52—Constituents or additives characterised by their shapes
    • C04B2235/5208—Fibers
    • C04B2235/5216—Inorganic
    • C04B2235/524—Non-oxidic, e.g. borides, carbides, silicides or nitrides
    • C04B2235/5244—Silicon carbide
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/52—Constituents or additives characterised by their shapes
    • C04B2235/5208—Fibers
    • C04B2235/5216—Inorganic
    • C04B2235/524—Non-oxidic, e.g. borides, carbides, silicides or nitrides
    • C04B2235/5248—Carbon, e.g. graphite
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/52—Constituents or additives characterised by their shapes
    • C04B2235/5208—Fibers
    • C04B2235/526—Fibers characterised by the length of the fibers
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/52—Constituents or additives characterised by their shapes
    • C04B2235/5208—Fibers
    • C04B2235/5264—Fibers characterised by the diameter of the fibers
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/52—Constituents or additives characterised by their shapes
    • C04B2235/5208—Fibers
    • C04B2235/5268—Orientation of the fibers
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30—Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/32—Ceramic
    • C04B2237/34—Oxidic
    • C04B2237/341—Silica or silicates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30—Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/32—Ceramic
    • C04B2237/34—Oxidic
    • C04B2237/343—Alumina or aluminates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30—Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/32—Ceramic
    • C04B2237/38—Fiber or whisker reinforced
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/58—Forming a gradient in composition or in properties across the laminate or the joined articles
    • C04B2237/582—Forming a gradient in composition or in properties across the laminate or the joined articles by joining layers or articles of the same composition but having different additives
    • C04B2237/584—Forming a gradient in composition or in properties across the laminate or the joined articles by joining layers or articles of the same composition but having different additives the different additives being fibers or whiskers

Abstract

La présente invention concerne un corps moulé en fibres, comprenant des fibres courtes (3) de céramiques oxydes, qui sont fixées par un liant, caractérisé en ce que le corps moulé en fibres est constitué de plusieurs couches d'une matrice de fibres courtes, qui est formée de fibres courtes réparties de façon homogène et cofrittées en leurs points de croisement, qu'entre les couches de la matrice de fibres courtes sont disposées des fibres longues (4) qui se touchent par points, les fibres longues individuelles étant entourées de tous côtés par des fibres d'appui (5). Procédé de préparation et utilisation.The present invention relates to a fiber molded body, comprising short fibers (3) of ceramic oxides, which are fixed by a binder, characterized in that the fiber molded body consists of several layers of a short fiber matrix, which is formed of short fibers distributed evenly and co-sintered at their crossing points, that between the layers of the short fiber matrix are arranged long fibers (4) which touch each other at points, the individual long fibers being surrounded by all sides by support fibers (5). Method of preparation and use.

Description

-1- L'invention concerne un corps moulé en fibres et un procédé pour le-1- The invention relates to a molded fiber body and a method for the

préparer ainsi que l'utilisation du corps moulé pour préparer des pièces de fonderie  prepare as well as using the molded body to prepare foundry parts

d'aluminium renforcées de fibres.of aluminum reinforced with fibers.

Par matériau composite de fibres métalliques,  By composite material of metallic fibers,

on comprend les matériaux pour lesquels des fibres mé-  we understand the materials for which fibers

talliques ou non-métalliques, continues ou discontinues  metallic or non-metallic, continuous or discontinuous

sont incorporées dans une matrice métallique Les pro-  are incorporated into a metal matrix.

priétés de tels matériaux composites résultent des propriétés chimiques, physiques ou mécaniques spéciales de la matrice et des fibres C'est pourquoi la géométrie des fibres, la quantité de fibres et l'agencement des  properties of such composite materials result from the special chemical, physical or mechanical properties of the matrix and of the fibers. This is why the geometry of the fibers, the quantity of fibers and the arrangement of the fibers.

fibres dans le matériau composite jouent un rôle important.  fibers in the composite material play an important role.

En outre, naturellement, des questions comme l'adhérence et le mouillage des fibres par le matériau de matrice  Also, of course, issues like the adhesion and wetting of the fibers by the matrix material

ont une signification exceptionnelle.  have exceptional significance.

Le procédé le plus usuel de préparation d'un  The most common method of preparing a

matériau composite du type cité au début est l'incorpo-  composite material of the type mentioned at the beginning is the

ration dans la matrice d'une phase de renfort préparée à part, par exemple par infiltration à l'état fondu, enduction de fibres et compression, compression de fibres et de feuilles de matrice empilées, et dans des cas particuliers, l'incorporation par métallurgie des  ration in the matrix of a reinforcing phase prepared separately, for example by infiltration in the molten state, coating of fibers and compression, compression of fibers and stacked matrix sheets, and in special cases, the incorporation by metallurgy of

poudres (voir Ullmann, Tome 23, p 545 et suivantes).  powders (see Ullmann, Tome 23, p 545 et seq.).

Dans ces cas, la phase de renfort n'est formée que de  In these cases, the reinforcement phase is only formed of

fibres courtes ou whiskers, ou seulement de fibres lon-  short fibers or whiskers, or only long fibers

gues Lors de la compression d'empilements de fibres et de feuilles de matrice, les fibres individuelles sont maintenues mécaniquement ensemble, et ensuite les  gues When compressing stacks of fibers and matrix sheets, the individual fibers are held mechanically together, and then

fibres préassemblées sont incorporées dans la matrice.  pre-assembled fibers are incorporated into the matrix.

Les corps moulés constitués seulement de fibres courtes conviennent bien à la réalisation de pièces de fonderie métalliques renforcées de fibres, par exemple par infiltration sous pression Il faut que la fixation locale des fibres courtes par le liant soit suffisamment -2- résistante pour que le corps moulé en fibres puisse résister sans modification de forme au métal fondu qui  Molded bodies made up only of short fibers are well suited for making fiber-reinforced metal foundries, for example by pressure infiltration. The local fixing of the short fibers by the binder must be sufficiently resistant so that the body molded in fibers can resist without modification of form the molten metal which

arrive La capacité thermique élevée, ainsi que la régu-  happens The high thermal capacity, as well as the

larité de la porosité, permettent une infiltration totale sans problème par le métal fondu. Les valeurs de résistance de telles pièces de fonderie renforcées aux fibres courtes sont en général supérieures à celles des pièces non renforcées Cependant, le gain de résistance n'est que limité, puisque les fibres courtes, en raison de leur répartition aléatoire, ne peuvent pas s'opposer de façon appropriée à une  the porosity, allow total infiltration without problem by the molten metal. The resistance values of such foundries reinforced with short fibers are generally higher than those of unreinforced parts. However, the gain in resistance is only limited, since short fibers, due to their random distribution, cannot appropriately oppose a

contrainte dans une direction donnée.  constraint in a given direction.

Dans les corps moulés comprenant seulement des fibres longues, la plupart des fibres à haute résistance  In molded bodies comprising only long fibers, most high strength fibers

reprennent une partie de la contrainte externe, la résis-  take up part of the external constraint, the resistance

tance maximale à la contrainte se trouvant dans le sens de la fibre Le transfert de force de la matrice aux  maximum stress strain in the direction of the fiber The force transfer from the matrix to the

fibres se fait par des forces de cisaillement à l'inter-  fibers is done by shear forces at the inter-

face fibre/matrice, de sorte que les propriétés du maté-  fiber / matrix face, so that the properties of the material

riau composite sont quantitativement influencées par la compatibilité fibre-matrice Les fibres longues sont  composite fibers are quantitatively influenced by fiber-matrix compatibility Long fibers are

disposées surtout parallèlement à la direction qui cor-  especially arranged parallel to the direction which cor-

respond à la direction principale de contrainte du corps moulé renforcé aux fibres Les fibres longues ne doivent pas être en contact sur toute leur longueur ou sur des domaines partiels étendus, mais elles ne doivent être en contact que par points, afin qu'elles soient entourées le plus complètement possible par la masse de métal fondu infiltré. Le plus souvent, les fibres préparées ne sont pas enduites ou sont munies, le cas échéant, de promoteur d'adhérence et on les incorpore dans la matrice Mais  responds to the main direction of stress of the fiber-reinforced molded body Long fibers must not be in contact over their entire length or over extended partial areas, but they must only be in contact at points, so that they are surrounded as completely as possible by the mass of infiltrated molten metal. Most often, the fibers prepared are not coated or are provided, if necessary, with adhesion promoter and they are incorporated into the matrix.

il y a aussi des fibres qui sont déjà partiellement en-  there are also fibers that are already partially

duites de matériau de matrice avant l'incorporation au composite Un avantage essentiel de cette technique est -3-  matrix material picks before incorporation into the composite An essential advantage of this technique is -3-

la facilité de réglage des proportions volumiques matrice-  the ease of adjusting the matrix volume proportions-

fibre On peut réaliser avec une grande précision le revêtement de chaque fibre individuelle, de sorte qu'aussi dans le matériau composite terminé on obtienne une proportion volumique définie. Dès qu'on utilise un liant, il faut qu'il soit dosé et réparti de telle façon qu'il y ait une bonne  fiber The coating of each individual fiber can be carried out with great precision, so that also in the finished composite material a defined volume proportion is obtained. As soon as a binder is used, it must be dosed and distributed in such a way that there is good

tenue du corps moulé et qu'il subsiste un faible inter-  holding of the molded body and that there is a weak inter-

valle entre les fibres afin qu'on puisse infiltrer le  valley between the fibers so that we can infiltrate the

corps moulé avec de la masse fondue de métal.  body molded with metal melt.

Naturellement, dans ce mode de liaison des fibres, la stabilité du corps moulé est comparativement réduite, de sorte qu'en cas d'infiltration le risque subsiste que le corps moulé perde sa forme et que le  Naturally, in this mode of fiber bonding, the stability of the molded body is comparatively reduced, so that in the event of infiltration the risk remains that the molded body loses its shape and that the

renforcement de la pièce de fonderie ne soit qu'incomplet.  reinforcement of the casting is only incomplete.

Un autre inconvénient des corps moulés à fibres longues est leur faible capacité calorifique, avec pour conséquence qu'ils se refroidissent rapidement après préchauffage pour préparer l'infiltration Le métal fondu après l'infiltration se solidifie relativement  Another disadvantage of long fiber molded bodies is their low heat capacity, with the consequence that they cool quickly after preheating to prepare for infiltration The molten metal after infiltration relatively solidifies

rapidement, de sorte que le corps moulé n'est pas tou-  quickly, so that the molded body is not always

jours complètement rempli Cela conduit à des hétérogé-  days completely filled This leads to heterogeneous-

néités lors de la contrainte externe de pièces de fonderie  born during the external constraint of foundry parts

renforcées aux fibres longues.reinforced with long fibers.

En raison des différents procédés de fabrication, les propriétés mécaniques de chaque matériau composite sont très dispersées Pour les matériaux renforcés aux  Due to the different manufacturing processes, the mechanical properties of each composite material are widely dispersed.

whiskers, on rencontre dans la plupart des cas des va-  Whiskers, in most cases we find

leurs plus faibles que pour les matériaux renforcés aux  lower than for materials reinforced with

fibres, ce qui est lié à la forte dispersion des proprié-  fibers, which is linked to the high dispersion of the properties

tés des whiskers et aux dommages qu'ils subissent lors de la préparation des matériaux composites En outre, les whiskers, par suite de leur mode de fabrication compliqué présentent un prix très élevé par rapport aux autres matériaux de renfort et ils sont dangereux pour -4-  Whisker tees and the damage they suffer during the preparation of composite materials In addition, whiskers, due to their complicated manufacturing method, are very expensive compared to other reinforcing materials and are dangerous for -4 -

la santé car ils peuvent parvenir aux poumons.  health as they can get to the lungs.

Le but de la présente invention est de proposer un corps moulé en fibres ainsi qu'un procédé pour le préparer qui conduise à une porosité régulière, à une résistance et stabilité de forme élevées, à une capacité  The object of the present invention is to provide a fiber molded body and a process for preparing it which leads to regular porosity, to high strength and shape stability, to a capacity

calorifique importante et à de bonnes propriétés d'in-  high calorific value and good properties of

filtration pour la masse de métal fondu Pour l'utilisa-  filtration for the mass of molten metal For use

tion de corps moulés fibreux pour produire des pièces de fonderie renforcées aux fibres, on doit améliorer notablement, outre la résistance générale dans toutes les directions, notamment la résistance à la chaleur  tion of fibrous molded bodies to produce fiber-reinforced foundries, in addition to the general resistance in all directions, in particular the heat resistance,

dans le sens de la contrainte principale.  in the direction of the main constraint.

Ce problème est résolu selon l'invention par  This problem is solved according to the invention by

les caractéristiques indiquées dans les revendications  the characteristics indicated in the claims

du brevet Il s'est avéré que la structure particulière  of the patent It turned out that the particular structure

du corps moulé poreux en plusieurs couches et la dispo-  of the porous molded body in several layers and the provision

sition de fibres courtes, longues et d'appui permettent son utilisation à l'infiltration sous pression pour préparer des pièces moulées sous pression, renforcées aux fibres, en aluminium ou alliage d'aluminium Les pièces composites métal-céramique ainsi produites se caractérisent par une densité élevée à faible porosité et par une très bonne résistance à la chaleur, notamment dans le sens longitudinal des fibres, ainsi que par une résistance améliorée dans le sens transversal par rapport  sition of short, long and support fibers allow its use for pressure infiltration to prepare pressure-molded parts, reinforced with fibers, in aluminum or aluminum alloy The metal-ceramic composite parts thus produced are characterized by a high density with low porosity and by a very good resistance to heat, in particular in the longitudinal direction of the fibers, as well as by an improved resistance in the transverse direction compared to

au sens longitudinal de fibre.in the longitudinal direction of fiber.

Le corps moulé en fibres est donc constitué de plusieurs couches d'une matrice de fibres courtes, qui est formée de fibres courtes réparties de façon homogène  The fiber molded body therefore consists of several layers of a short fiber matrix, which is formed of short fibers distributed uniformly.

et frittées en leurs points de croisement, avec inter-  and sintered at their crossing points, with inter-

position entre les couches de fibres courtes, de fibres  position between layers of short fibers, fibers

longues qui se touchent ponctuellement et qui sont en-  which touch each other from time to time and which are

tourées de tous côtés de fibres d'appui.  turned on all sides with supporting fibers.

La longueur moyenne des fibres courtes est de préférence 1-5 mm, tandis que la longueur moyenne des -5-  The average length of the short fibers is preferably 1-5 mm, while the average length of the -5-

fibres d'appui est comprise entre 50 Mm et 100 pm.  support fibers is between 50 mm and 100 pm.

Dans ce cas, il s'est avéré avantageux que le diamètre moyen des fibres courtes et des fibres d'appui soit de -15 um, tandis que le diamètre moyen des fibres longues est 30-80 pim Dans ces conditions, on obtient avec une teneur volumique des fibres courtes dans le corps moulé de 25-60 % en volume un corps moulé en fibres poreux avec une taille de pores appropriée à l'infiltration  In this case, it has been found advantageous that the average diameter of the short fibers and of the support fibers is -15 μm, while the average diameter of the long fibers is 30-80 μm. Under these conditions, one obtains with a volume content of short fibers in the molded body of 25-60% by volume a molded body of porous fibers with a pore size suitable for infiltration

de masse fondue.melt.

Pour les pièces de machine très sollicitées comme bielle, fond de piston, support de segment ou culasse de moteurs à combustion interne, s'est avérée utile une proportion volumique de fibres longues dans  For highly stressed machine parts such as connecting rod, piston bottom, segment support or cylinder head of internal combustion engines, a volume proportion of long fibers has been found useful in

le corps moulé qui est comprise entre 5 et 35 % en volume.  the molded body which is between 5 and 35% by volume.

Dans ce cas, l'intervalle moyen des fibres longues dans  In this case, the average interval of long fibers in

le corps moulé est compris entre 10 et 50 pm.  the molded body is between 10 and 50 μm.

Lors de la préparation de corps moulé selon l'invention, il est important que les substances de base  When preparing the molded body according to the invention, it is important that the basic substances

et les additifs soient constitués des matériaux appro-  and the additives are made of suitable materials

priés A la suite de nombreux essais, il s'est avéré que les fibres courtes et les fibres d'appui doivent être en A 1203 ou mullite, les fibres longues en A 1203, Si C  required After numerous tests, it has been found that the short fibers and the supporting fibers must be in A 1203 or mullite, the long fibers in A 1203, Si C

ou carbone, tandis que le liant a une composante orga-  or carbon, while the binder has an organic component

nique, par exemple l'amidon et une composante minérale à base de Sio 2 ou de A 1203 Le procédé de l'invention prévoit de placer une suspension de fibres courtes, d'eau et d'un mélange de liant dans un moule, et de déposer sur cette première couche des fibres longues à intervalle régulier avec des fibres d'appui, en aspirant simultanément de l'eau hors du moule, puis on réalise  nique, for example starch and a mineral component based on Sio 2 or A 1203 The process of the invention provides for placing a suspension of short fibers, water and a mixture of binder in a mold, and depositing on this first layer long fibers at regular intervals with support fibers, simultaneously drawing water out of the mold, then we realize

un séchage à haute température sous forte pression jus-  drying at high temperature under high pressure until

qu'à ce qu'on obtienne un corps en fibres de forme stable et après extraction du corps, on réalise une cuisson entre 800-10000 C On peut poursuivre ce procédé de façon à avoir une structure multicouche pour donner le corps -6-  until a body of fibers of stable shape is obtained and after extraction from the body, a firing between 800-10000 C is carried out. This process can be continued so as to have a multilayer structure to give the body -6-

de fibres moulé.molded fiber.

Il est aussi possible d'incorporer directement dans la matrice de fibres courtes du corps moulé des fibres longues On réalise cela en incorporant dans la première suspension de fibres courtes des fibres longues individuelles, en facilitant la répartition homogène en  It is also possible to incorporate long fibers directly into the short fiber matrix of the molded body. This is done by incorporating individual long long fibers into the first short fiber suspension, facilitating the homogeneous distribution in

utilisant simultanément des vibrations.  using vibrations simultaneously.

Dans ce cas, la teneur en fibres courtes ne doit  In this case, the short fiber content should not

pas dépasser une limite de 5 % en volume.  not exceed a limit of 5% by volume.

Ci-dessous, on va décrire plus en détail l'in-  Below, we will describe in more detail the

vention à l'aide d'un mode de réalisation: Dans le moule 1, on place une première couche 2 d'une suspension comprenant des fibres courtes 3, de l'eau ainsi qu'un mélange de liant Ensuite, on dépose des fibres longues 4 avec des fibres d'appui 5, tout en  vention using an embodiment: In the mold 1, a first layer 2 of a suspension comprising short fibers 3, water and a mixture of binder are placed. Next, fibers are deposited. long 4 with support fibers 5, while

aspirant de l'eau du moule 1 par la conduite 6.  drawing water from mold 1 through line 6.

Pour faciliter la répartition homogène des fi-  To facilitate the homogeneous distribution of the

bres longues, on peut placer un vibrateur 7 sur le moule 1 Sur la couche des fibres longues 4, on dépose une  long stones, a vibrator 7 can be placed on the mold 1 On the layer of long fibers 4, a

autre couche 8 d'une suspension de fibres courtes 9.  another layer 8 of a suspension of short fibers 9.

On répète ces opérations jusqu'à ce que le moule soit rempli complètement Pour améliorer l'élimination de l'eau, l'intérieur du moule 1 est revêtu d'un matériau  These operations are repeated until the mold is completely filled. To improve the elimination of water, the interior of the mold 1 is coated with a material.

poreux 10.porous 10.

Le corps moulé, constitué des différentes cou-  The molded body, made up of different

ches, est comprimé par une plaque 11 de compression dans le moule tout en aspirant encore l'eau résiduelle par la conduite 6 Le séchage du corps moulé de fibres mécaniquement déshydraté se fait vers 1100 C environ en 12 à 24 heures Dans ce cas, grâce à la teneur en liant organique, on obtient la résistance nécessaire à l'état cru qui facilite une manipulation ultérieure du corps  ches, is compressed by a compression plate 11 in the mold while still sucking the residual water through line 6 The drying of the molded body of mechanically dehydrated fibers takes place at around 1100 C in 12 to 24 hours In this case, thanks the organic binder content gives the necessary strength in the raw state which facilitates subsequent handling of the body

moulé jusqu'à la fin du processus de cuisson.  molded until the end of the cooking process.

Après prélèvement du corps cru, on réalise, au cours d'un processus particulier de frittage à environ -7- 1000 'C, un frittage des différentes fibres, pour donner un corps moulé en fibres à porosité régulière, pendant le processus de frittage on réalise entre le liant minéral et les fibres un collage solide des fibres et ainsi un corps de forme stable avec une résistance finale élevée. Grâce à leur répartition de pores spécifique, les corps en fibres moulés selon l'invention conviennent particulièrement à la préparation de pièces de fonderie  After removal of the green body, during a specific sintering process at about -7- 1000 ° C., sintering of the various fibers is carried out, to give a molded body of fibers with regular porosity, during the sintering process. between the mineral binder and the fibers provides a solid bonding of the fibers and thus a body of stable shape with high final strength. Thanks to their specific pore distribution, the molded fiber bodies according to the invention are particularly suitable for the preparation of castings

métalliques moulées sous pression, par exemple par in-  metal die-cast, for example by

filtration de métal fondu On peut déjà donner la forme  filtration of molten metal We can already give the form

finale du produit par préparation du corps moulé en fi-  final product preparation of the molded body

bres grâce à la configuration appropriée du moule On peut aussi préparer un corps moulé à partir duquel on  bres thanks to the appropriate mold configuration We can also prepare a molded body from which we

prépare la pièce constitutive finale par procédé d'en-  prepares the final component part by

lèvement de copeaux après l'infiltration En outre, on peut donner la forme par usinage après séchage ou après cuisson, par exemple par sciage, polissage ou analogue, mais ce n'est qu'après l'infiltration par la masse fondue qu'on peut réaliser les opérations par les procédés connus d'assemblage comme la soudure par fusion, la soudure par  chip removal after infiltration In addition, it can be shaped by machining after drying or after firing, for example by sawing, polishing or the like, but it is only after infiltration by the melt that can perform operations by known assembly methods such as fusion welding, welding by

diffusion, le collage ou analogue.diffusion, collage or the like.

Le type de liaison entre les fibres est un fac-  The type of bond between the fibers is a fac-

teur décisif de résistance et de stabilité de forme des corps moulés et ainsi c'est important pour l'usinage ultérieur Le liant, selon l'invention, à composante minérale et organique se concentre, par suite de sa tension superficielle particulière, de préférence aux points de contact entre les fibres Il se forme en ces  decisive factor in the strength and stability of shape of the molded bodies and thus it is important for subsequent machining The binder, according to the invention, with mineral and organic component is concentrated, owing to its particular surface tension, preferably in contact points between the fibers It is formed in these

endroits des liaisons de pontage solides qui sont stabi-  locations of solid bridging links that are stable

lisées dans les processus thermiques suivants.  read in the following thermal processes.

La cohésion du corps moulé est d'autant plus  The cohesion of the molded body is all the more

grande que le nombre de points de contact entre les fi-  large as the number of contact points between the fi-

bres est élevé Il faut cependant garantir que les fibres  bres is high However, it must be guaranteed that the fibers

sont en contact par des points et non par des lignes.  are in contact by dots and not by lines.

Par contact étendu sur une partie ou même sur toute la -8- longueur des fibres, il se crée des domaines de corps  By contact extended over a part or even over the entire length of the fibers, body areas are created.

moulés pratiquement denses, dans lesquels, lors de l'in-  practically dense molds, in which, during the

filtration, la masse fondue de métal ne peut pénétrer.  filtration, the metal melt cannot penetrate.

Ceci conduit à une perte notable de résistance et ainsi à une zone locale de faiblesse, qui, de par son compor-  This leads to a notable loss of resistance and thus to a local zone of weakness, which, by its

tement à la résistance se situe encore nettement en des-  resistance is still clearly below

sous d'une pièce moulée non renforcée.  under an unreinforced molded part.

Pour éviter ce problème qui survient notamment  To avoid this problem which occurs in particular

lors de l'utilisation d'une teneur élevée en fibres lon-  when using a high fiber content long

gues, on prévoit, selon l'invention, d'enrober de fibres  according to the invention, it is planned to coat fibers

d'appui les fibres longues et de les incorporer simulta-  support the long fibers and incorporate them simultaneously

nément dans la matrice de fibres courtes Les fibres  particularly in the short fiber matrix The fibers

d'appui garantissent dans ce cas l'intervalle indispen-  in this case guarantee the essential interval

sable entre les fibres longues ainsi que des lieux de contact ponctuels aussi nombreux que possible, aussi  sand between the long fibers as well as point contact places as numerous as possible, also

bien avec les fibres courtes qu'avec les fibres longues.  well with short fibers than with long fibers.

Le résultat de la constitution selon l'invention se traduit par une fibre longue solidement ancrée dans le corps moulé, la porosité indispensable à l'infiltration  The result of the constitution according to the invention results in a long fiber firmly anchored in the molded body, the porosity essential for infiltration

de la masse fondue restant maintenue entre les fibres.  of the remaining melt held between the fibers.

Naturellement, les fibres longues sont disposées  Naturally, the long fibers are arranged

de manière préférée de telle façon qu'elles soient orien-  preferably in such a way that they are orient-

tées dans la pièce de fonderie renforcée aux fibres  tees in the fiber reinforced foundry

parallèlement à la direction principale de contrainte.  parallel to the main constraint direction.

A l'exemple choisi, le moule 1 et la composition en fibres sont présentés en coupe, de sorte que la direction  In the example chosen, the mold 1 and the fiber composition are presented in section, so that the direction

principale de contrainte s'étend dans un plan perpendi-  principal stress extends in a plane perpendicular

culaire au plan de figure Les fibres longues doivent s'étendre le plus possible sur toute la longueur du corps moulé, pour garantir une résistance maximale dans  Cular to the figure plane The long fibers must extend as far as possible over the entire length of the molded body, to guarantee maximum resistance in

le sens principal de contrainte.the main sense of restraint.

Pour produire des pièces de fonderie renforcées de fibres en aluminium ou alliage d'aluminium, des fibres courtes et des fibres d'appui en Al 203 ou mullite et des fibres longues en A 1203 Si C ou carbone se sont avérées -9- appropriées Ces fibres sont suffisamment résistantes à  To produce foundries reinforced with aluminum or aluminum alloy fibers, short fibers and support fibers in Al 203 or mullite and long fibers in A 1203 If C or carbon have been found to be suitable fibers are sufficiently resistant to

la température et présentent un bon mouillage par l'alu-  temperature and have good aluminum wetting

minium fondu Ensuite, elles sont suffisamment résistantes  minium melted Then they are sufficiently resistant

d'un point de vue chimique vis-à-vis de l'aluminium li-  from a chemical point of view with respect to aluminum li-

quide et conviennent extrêmement bien au frittage avec  which are extremely suitable for sintering with

le mélange de liant minéral et organique utilisé.  the mixture of mineral and organic binder used.

Les longueurs et diamètres moyens des fibres  Average fiber lengths and diameters

longues et des fibres d'appui sont adaptés selon l'inven-  long and supporting fibers are adapted according to the invention

tion de telle façon qu'après l'incorporation dans le mélange de liant et après le frittage, on obtienne un corps moulé poreux, qui présente une micro-macroporosité particulièrement appropriée à l'infiltration par la masse fondue Il s'est avéré que la microporosité survenant après frittage en raison des fissures de retrait exerce une influence capitale sur l'adaptation à l'infiltration sous pression On améliore beaucoup ainsi l'adhérence  tion in such a way that after incorporation into the binder mixture and after sintering, a porous molded body is obtained, which has a micro-macroporosity which is particularly suitable for infiltration by the melt. It has been found that the microporosity occurring after sintering due to shrinkage cracks exerts a capital influence on the adaptation to pressure infiltration.

entre les fibres, le matériau fritté et le métal liquide.  between the fibers, the sintered material and the liquid metal.

Après le séchage du corps moulé à haute tempé-  After the molded body has dried at high temperature

rature et sous forte pression, on obtient d'abord une résistance à l'état cru, qui doit être suffisante pour pouvoir sortir le corps moulé du moule 1 et le cas échéant après une première mise en forme le soumettre au processus de frittage proprement dit Sur des pièces d'essai, on a constaté qu'il fallait avoir une proportion  erasure and under high pressure, we first obtain a resistance in the raw state, which must be sufficient to be able to remove the molded body from the mold 1 and if necessary after a first shaping subject it to the sintering process proper On test pieces, it was found that it was necessary to have a proportion

volumique en fibres courtes dans le corps moulé qui at-  volume in short fibers in the molded body which

teigne au moins 5 % en volume afin d'obtenir une résis-  mites at least 5% by volume in order to obtain

tance suffisante à l'état cru pour pouvoir manipuler ultérieurement le corps moulé Mais la stabilité de forme, lors de l'infiltration sous pression ultérieure nécessite une proportion volumique supérieure en fibres courtes qui doit être d'au moins 15 % en volume, sinon on n'obtient une augmentation de la résistance dans la pièce de fonderie renforcée aux fibres que de moins de  sufficient strength in the raw state to be able to manipulate the molded body at a later date. However, the shape stability during infiltration under subsequent pressure requires a higher proportion by volume of short fibers which must be at least 15% by volume, otherwise achieves an increase in resistance in the fiber reinforced foundry of less than

% par rapport à une pièce de fonderie non renforcée.  % compared to an unreinforced foundry part.

Au-dessus de 60 % en volume, on dépasse la densité -10- d'empilement optimale des fibres courtes entre les fibres longues, de sorte qu'aussi pour des teneurs réduites en fibres longues, inférieures à 15 % en volume, les fibres peuvent se rompre lors de la compression du corps moulé pendant sa fabrication En raison des hétérogénéités  Above 60% by volume, the optimum stacking density of the short fibers is exceeded between the long fibers, so that also for reduced contents of long fibers, less than 15% by volume, the fibers may break during compression of the molded body during its manufacture Due to heterogeneities

qui surviennent alors et des faiblesses dans la compo-  that arise then and weaknesses in the composition

sante fibres longues, on n'obtient pas une résistance suffisante de la pièce de fonderie après infiltration  health long fibers, one does not obtain a sufficient resistance of the casting after infiltration

du corps moulé par le métal liquide.  body molded by liquid metal.

De manière analogue, la teneur volumique en fibres longues inférieure à 5 % en volume dans la pièce  Similarly, the volume content of long fibers less than 5% by volume in the room

de fonderie renforcée aux fibres est inefficace, puis-  fiber-reinforced foundry is ineffective,

qu'on ne peut pas obtenir d'augmentation de la résistance.  you can't get an increase in resistance.

Au-dessus de 35 % en volume, l'intervalle entre  Above 35% by volume, the interval between

les fibres longues est si faible qu'on ne peut pas ga-  the long fibers is so weak that we cannot ga-

rantir une proportion de fibres courtes ou de fibres d'appui suffisantes entre les fibres longues Des études ont montré que dans ce cas, les fibres longues se touchent en s'allongeant, ce qui fait surgir les inconvénients signalés au début La proportion optimale de fibres longues dans le corps moulé en fibres est donc comprise entre 15 et 30 % en volume pour permettre un intervalle de sécurité suffisant vis-à-vis des valeurs limites mentionnées. Selon une réalisation particulière de l'invention, on doit choisir la proportion volumique des fibres longues en fonction du diamètre des fibres longues, de sorte que l'intervalle entre les fibres mesuré entre les surfaces de fibres se faisant face soit compris entre 8 et 70 jim Pour un écartement des fibres longues supérieur à 70 pm, l'augmentation possible de résistance de la pièce de fonderie renforcée en fibres dans le sens  rantir a proportion of short fibers or sufficient support fibers between the long fibers Studies have shown that in this case, the long fibers touch each other while lengthening, which brings out the disadvantages indicated at the beginning The optimal proportion of fibers long in the fiber molded body is therefore between 15 and 30% by volume to allow a sufficient safety interval with respect to the mentioned limit values. According to a particular embodiment of the invention, the volume proportion of the long fibers must be chosen as a function of the diameter of the long fibers, so that the interval between the fibers measured between the surfaces of fibers facing each other is between 8 and 70 jim For a spacing of long fibers greater than 70 µm, the possible increase in resistance of the fiber-reinforced casting in the direction

de l'orientation des fibres est relativement faible.  fiber orientation is relatively low.

Pour des intervalles inférieurs à 8 >m, on a les mêmes inconvénients que ceux observés pour les teneurs en - 11-  For intervals of less than 8> m, we have the same drawbacks as those observed for the contents of - 11-

fibres longues supérieures à 35 % en volume.  long fibers greater than 35% by volume.

Selon l'invention, la teneur en liant est de  According to the invention, the binder content is

2 à 10 % en poids par rapport à la teneur totale en fibres.  2 to 10% by weight relative to the total fiber content.

Une teneur en liant d'au moins 2 % est nécessaire pour  A binder content of at least 2% is necessary to

obtenir une résistance élevée par suite de la forte in-  obtain a high resistance as a result of the high in-

corporation des fibres longues dans la matrice de fibres courtes Si on dépasse la limite supérieure en liant de %, on risque de ne pas obtenir une porosité régulière,  corporation of long fibers in the short fiber matrix If we exceed the upper limit by binding of%, we risk not obtaining a regular porosity,

de sorte que l'infiltration de métal liquide est irré-  so that the infiltration of liquid metal is irre-

gulière et en partie incomplète Pour une teneur en liant de 5 à 8 % en poids, on obtient une stabilité mécanique très élevée vis-à-vis du métal liquide infiltré, qui se trouve sous pression très élevée En outre, un corps moulé poreux avec la teneur en liant préférée présente une capacité calorifique élevée en comparaison d'un corps  regular and partly incomplete For a binder content of 5 to 8% by weight, very high mechanical stability is obtained with respect to the infiltrated liquid metal, which is found under very high pressure In addition, a porous molded body with the preferred binder content has a high heat capacity compared to a body

qui contient une teneur en liant plus faible.  which contains a lower binder content.

-12--12-

Claims (16)

REVENDICATIONS 1 Corps moulé en fibres, comprenant des fibres courtes de céramiques oxydes, qui sont fixées par un liant, caractérisé en ce que le corps moulé en fibres est constitué de plusieurs couches d'une matrice de fibres courtes qui est formée de fibres courtes réparties  1 fiber molded body, comprising short ceramic oxide fibers, which are fixed by a binder, characterized in that the fiber molded body consists of several layers of a short fiber matrix which is formed from distributed short fibers de façon homogène et cofrittées en leurs points de croi-  homogeneously and co-sintered at their cross points sement, qu'entre les couches de la matrice de fibres courtes sont disposées des fibres longues qui se touchent  sement, that between the layers of the short fiber matrix are arranged long fibers which touch each other par points, les fibres longues individuelles étant en-  by points, the individual long fibers being tourées de tous côtés par des fibres d'appui.  turned on all sides by supporting fibers. 2 Corps moulé en fibres, caractérisé en ce que des fibres longues sont incorporées dans la matrice de  2 Fiber molded body, characterized in that long fibers are incorporated in the matrix fibres courtes du corps moulé.short fibers of the molded body. 3 Corps moulé en fibre, selon l'une des reven-  3 Body molded in fiber, according to one of the res dications précédentes, caractérisé en ce que les fibres longues incorporées sont dirigées au moins dans une direction du corps moulé et qu'elles s'étendent dans ce  dications previous, characterized in that the long fibers incorporated are directed at least in one direction of the molded body and that they extend in this sens sur toute la longueur-du corps moulé.  full-length sense of the molded body. 4 Corps moulé en fibres selon l'une des reven-  4 Body molded in fibers according to one of the res dications précédentes, caractérisé en ce que les fibres  previous indications, characterized in that the fibers courtes et les fibres d'appui sont en A 1203 ou en mullite.  short and the support fibers are A 1203 or mullite. Corps moulé en fibres selon l'une des reven- dications précédentes, caractérisé en ce que le liant se compose d'un mélange d'amidon, Si O 2 et/ou A 1203  Body molded in fibers according to one of the preceding claims, characterized in that the binder consists of a mixture of starch, Si O 2 and / or A 1203 6 Corps moulé en fibres selon l'une des reven-  6 Body molded in fibers according to one of the res- dications précédentes, caractérisé en ce que les fibres  previous indications, characterized in that the fibers longues sont en A 1203, Si C ou carbone.  long are in A 1203, Si C or carbon. 7 Corps moulé en fibres selon l'une des reven-  7 Body molded in fibers according to one of the res- dications précédentes, caractérisé en ce que la longueur moyenne des fibres courtes est comprise entre 1 et 5 mm, tandis que la longueur moyenne des fibres d'appui est  dications preceding, characterized in that the average length of the short fibers is between 1 and 5 mm, while the average length of the support fibers is comprise entre 50 lim et 100 pm.between 50 lim and 100 pm. 8 Corps moulé en fibres selon l'une des reven-  8 Body molded in fibers according to one of the -13- dications précédentes, caractérisé en ce que le diamètre moyen des fibres courtes et des fibres d'appui est de -15 fm, tandis que le diamètre moyen des fibres longues  -13- previous indications, characterized in that the average diameter of the short fibers and the support fibers is -15 fm, while the average diameter of the long fibers est de 30-80 pm.is 30-80 pm. 9 Corps moulé en fibres selon l'une des reven- dications précédentes, caractérisé en ce que la proportion volumique des fibres courtes dans le corps moulé est de -60 % en volume, de préférence 25-50 % en volume.  9 Fiber molded body according to one of the preceding claims, characterized in that the volume proportion of the short fibers in the molded body is -60% by volume, preferably 25-50% by volume. Corps moulé en fibres selon l'une des reven-  Body molded in fibers according to one of the res- dications précédentes, caractérisé en ce que la proportion volumique en fibres longues dans le corps moulé se situe entre 5 et 35 % en volume, de préférence entre 15 et 30 %  above, characterized in that the volume proportion of long fibers in the molded body is between 5 and 35% by volume, preferably between 15 and 30% en volume.in volume. 11 Corps moulé en fibres selon l'une des reven-  11 Body molded in fibers according to one of the res dications précédentes, caractérisé en ce que l'intervalle moyen entre les fibres longues dans le corps moulé se  dications previous, characterized in that the average interval between the long fibers in the molded body is situe entre 8 et 70 pm, de préférence entre 10 et 50 pm.  is between 8 and 70 pm, preferably between 10 and 50 pm. 12 Corps moulé en fibres selon l'une des reven-  12 Body molded in fibers according to one of the res dications précédentes, caractérisé en ce que la teneur en liant est de 2-10 % en poids par rapport à la teneur  above, characterized in that the binder content is 2-10% by weight relative to the content totale en fibres.total fiber. 13 Procédé de préparation d'un corps moulé en  13 Process for preparing a molded body fibres selon l'une des revendications précédentes,  fibers according to one of the preceding claims, caractérisé en ce qu'on place dans un moule une première couche d'une suspension de fibres courtes, d'eau ainsi que d'un mélange de liants organiques et minéraux, qu'on dépose ensuite des fibres longues à intervalles réguliers avec des fibres courtes, sur la première couche, tout en aspirant l'eau du moule, qu'on dépose sur les fibres longues une deuxième couche d'une suspension de fibres  characterized in that a first layer of a suspension of short fibers, water and a mixture of organic and mineral binders is placed in a mold, which long fibers are then deposited at regular intervals with fibers short, on the first layer, while sucking water from the mold, which is deposited on the long fibers a second layer of a suspension of fibers courtes, d'eau ainsi que d'un mélange de liants organi-  short, water and a mixture of organic binders ques et minéraux et qu'on réalise un séchage à haute température et haute pression, jusqu'à ce qu'on réalise un corps moulé de forme stable, qu'on soumet après prélèvement -14- du corps à un processus de cuisson entre 800 et 10000 C.  ques and minerals and that a drying is carried out at high temperature and high pressure, until a molded body of stable shape is produced, which is subjected after sampling -14- of the body to a cooking process between 800 and 10,000 C. 14 Procédé selon l'une des revendications  14 Method according to one of claims précédentes, caractérisé en ce que, pendant la mise en place de la première ou de la deuxième couche, on place dans le moule une suspension de fibres courtes, d'eau, ainsi que d'un mélange de liants et de fibres longues  above, characterized in that, during the installation of the first or second layer, a suspension of short fibers, water, as well as a mixture of binders and long fibers is placed in the mold avec des fibres d'appui.with backing fibers. Procédé selon l'une des revendications  Method according to one of the claims précédentes, caractérisé en ce que, pendant la mise en place des couches, on soumet le moule ou le contenu du  previous, characterized in that, during the installation of the layers, the mold or the content of the moule à une vibration.mold to a vibration. 16 Procédé selon l'une des revendications  16 Method according to one of claims précédentes, caractérisé en ce qu'on égoutte sous pres-  previous, characterized in that it drains under pressure sion le corps moulé avant le processus de séchage, jusqu'à ce qu'on obtienne une proportion volumique  the molded body before the drying process, until a volume proportion is obtained minimale de 5 % en volume de fibres courtes.  minimum 5% by volume of short fibers. 17 Dispositif pour réaliser le procédé de  17 Device for carrying out the l'invention selon l'une des revendications précédentes,  the invention according to one of the preceding claims, caractérisé en ce que dans un moule métallique ( 1) on place un tamis de drainage ( 10 > avec une conduite d'égouttage ( 6), que l'orifice de remplissage du moule peut être fermé par une plaque de compression ( 11) et que le moule ( 1) et/ou la plaque de compression ( 11) sont en communication avec un vibrateur ( 7) pour  characterized in that in a metal mold (1) a drainage screen is placed (10> with a drip line (6), that the filling opening of the mold can be closed by a compression plate (11) and that the mold (1) and / or the compression plate (11) are in communication with a vibrator (7) to soumettre le contenu du moule à une contrainte vibratoire.  subject the contents of the mold to vibrational stress. 18 Utilisation d'un corps moulé poreux en fi-  18 Use of a porous molded body bres, dans lequel des fibres longues enrobées de fibres d'appui sont incorporées dans la matrice de fibres courtes du corps moulé, pour produire des pièces de fonderie renforcées de fibres, en aluminium ou alliage  bres, in which long fibers coated with support fibers are incorporated in the short fiber matrix of the molded body, to produce foundries reinforced with fibers, of aluminum or alloy d'aluminium par infiltration de métal fondu.  aluminum by infiltration of molten metal. 19 Utilisation d'un corps moulé en fibres po-  19 Use of a molded fiber body reux selon l'une des revendications précédentes, pour  reux according to one of the preceding claims, for produire des pièces de fonderie moulées sous pression  produce die cast parts avec une résistance à la chaleur accrue de 10 %.  with an increased heat resistance of 10%.
FR9204942A 1991-07-17 1992-04-22 FIBER MOLDED BODY AND PROCESS FOR PREPARING SAME AND THE USE OF THE MOLDED BODY FOR PREPARING FIBER REINFORCED ALUMINUM FOUNDRY PARTS. Withdrawn FR2679226A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4123677A DE4123677A1 (en) 1991-07-17 1991-07-17 FIBER MOLDED BODY AND METHOD FOR THE PRODUCTION THEREOF AND USE OF THE MOLDED BODY FOR THE PRODUCTION OF FIBER REINFORCED ALUMINUM CASTING PARTS

Publications (1)

Publication Number Publication Date
FR2679226A1 true FR2679226A1 (en) 1993-01-22

Family

ID=6436364

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9204942A Withdrawn FR2679226A1 (en) 1991-07-17 1992-04-22 FIBER MOLDED BODY AND PROCESS FOR PREPARING SAME AND THE USE OF THE MOLDED BODY FOR PREPARING FIBER REINFORCED ALUMINUM FOUNDRY PARTS.

Country Status (3)

Country Link
DE (1) DE4123677A1 (en)
FR (1) FR2679226A1 (en)
GB (1) GB2257720A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4418447A1 (en) * 1994-05-26 1995-11-30 Wacker Chemie Gmbh Ceramic fibres which stick to each other on contact used e.g. as a reinforcing material
US6193915B1 (en) * 1999-09-03 2001-02-27 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of Natural Resources Process for fabricating low volume fraction metal matrix preforms
US6624105B2 (en) * 2000-09-28 2003-09-23 Mitsui Mining Material Co., Ltd. Oxide ceramic fiber/oxide ceramic composite material and process for production thereof
DE10122744A1 (en) * 2001-05-10 2002-11-14 Daimler Chrysler Ag Composite bolt used as a piston bolt consists of a metal sleeve filled with a composite material made from a light molten metal infiltrated with a powder charge
DE10233067A1 (en) * 2002-07-19 2004-02-05 Bühler AG Forming a crystallizable material in the liquid or pasty state
DE10319852B3 (en) * 2003-05-03 2004-12-09 Daimlerchrysler Ag Composite material used in the production of vehicles and engines comprises a metallic material which infiltrates a porous fibrous body which forms a blank
DE102004049406A1 (en) * 2004-10-08 2006-04-20 Deutsches Zentrum für Luft- und Raumfahrt e.V. Molded part made of long fiber and short fiber ceramics

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985004834A1 (en) * 1984-04-20 1985-11-07 United Technologies Corporation Method for forming fiber reinforced composite articles
GB2168284A (en) * 1984-12-05 1986-06-18 Didier Werke Ag Manufacturing refractory moulded bodies
DE3617055A1 (en) * 1985-05-21 1986-11-27 Kabushiki Kaisha Toyota Chuo Kenkyusho, Aichi FIBER MATERIAL FOR COMPOSITE MATERIALS, FIBER REINFORCED METALS MADE THEREOF AND METHOD FOR THE PRODUCTION THEREOF
EP0206989A1 (en) * 1985-06-14 1986-12-30 Schweizerische Aluminium Ag Asbest-free material containing inorganic fibres and process for its production

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7409452A (en) * 1973-07-17 1975-01-21 Ici Ltd FILTED PRODUCT.
DE2941606C2 (en) * 1979-10-13 1984-12-20 Grünzweig + Hartmann und Glasfaser AG, 6700 Ludwigshafen Thermal insulation body and a method for its production
CH645605A5 (en) * 1980-02-22 1984-10-15 Ametex Ag METHOD FOR PRODUCING A FIBER REINFORCED, HYDRAULICALLY BINDING COMPOSITION, THE COMPOSITION AND USE THEREOF PRODUCED BY THIS METHOD.
US4435468A (en) * 1982-02-12 1984-03-06 Kennecott Corp. Seamless ceramic fiber composite articles and method and apparatus for their production
DE3213951C2 (en) * 1982-04-16 1989-08-10 KERFA GmbH Industriebeheizungen, 5820 Gevelsberg Method of manufacturing a ceramic fiber insulating body
GB2140833B (en) * 1983-05-20 1987-07-29 Toshiba Monofrax Laminar block and method of and apparatus for producing same
DE3400215C2 (en) * 1984-01-05 1986-12-11 Didier-Werke Ag, 6200 Wiesbaden Process for the production of sandwich-like composite components from different fiber materials
JPS6385151A (en) * 1986-09-26 1988-04-15 株式会社豊田自動織機製作所 Production of fiber aggregate
JPS63165562A (en) * 1986-12-27 1988-07-08 電気化学工業株式会社 Heat resistant inorganic fiber molded body and its production
DE3816326A1 (en) * 1987-05-15 1988-11-24 Dornier System Gmbh Composite powder of metallic or ceramic whiskers
GB2230259B (en) * 1989-04-14 1993-11-17 Gen Electric Fibre reinforced ceramic matrix composite member and method for making
GB2230258B (en) * 1989-04-14 1993-10-20 Gen Electric Consolidated member and method and preform for making
DD284671A5 (en) * 1989-06-07 1990-11-21 Veb Metallurgieofenbau Meissen,Dd METHOD FOR PRODUCING FIRE-RESISTANT FIBER FORMKOERPER AND FIBER COMBINATIONS
DE3942338A1 (en) * 1989-12-21 1991-06-27 Metallgesellschaft Ag Fire retardant lightweight acoustic and thermal insulation prodn. - by adding binder components to fibre in two stages to reduce organic binder content
JPH1076742A (en) * 1996-09-03 1998-03-24 Hiroshi Midori Cancellation stamping device
JP3621205B2 (en) * 1996-09-11 2005-02-16 旭電化工業株式会社 Curable composition for liquid crystal alignment film

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985004834A1 (en) * 1984-04-20 1985-11-07 United Technologies Corporation Method for forming fiber reinforced composite articles
GB2168284A (en) * 1984-12-05 1986-06-18 Didier Werke Ag Manufacturing refractory moulded bodies
DE3617055A1 (en) * 1985-05-21 1986-11-27 Kabushiki Kaisha Toyota Chuo Kenkyusho, Aichi FIBER MATERIAL FOR COMPOSITE MATERIALS, FIBER REINFORCED METALS MADE THEREOF AND METHOD FOR THE PRODUCTION THEREOF
EP0206989A1 (en) * 1985-06-14 1986-12-30 Schweizerische Aluminium Ag Asbest-free material containing inorganic fibres and process for its production

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 107, no. 24, Décembre 1987, Columbus, Ohio, US; abstract no. 222057r, K. KAWASHIMA ET AL 'Heat-resistant ceramic sheets' page 283 ;colonne 1 ; *

Also Published As

Publication number Publication date
DE4123677A1 (en) 1993-01-21
GB9213767D0 (en) 1992-08-12
GB2257720A (en) 1993-01-20

Similar Documents

Publication Publication Date Title
FR2574072A1 (en) CERAMIC POROUS GRADIENT PIECE, AND USE THEREOF FOR THE MANUFACTURE OF COMPOSITE MATERIAL COMPOSITE PARTS
RU2176628C2 (en) Composite material (variants) and method or preparing thereof, method of treating fibrous semi-finished product (variants)
EP0677029B1 (en) Method for fabricating articles made of carbon-silicon carbide composite material, and composite carbon-silicon carbide material
WO2016001026A1 (en) Part coated with a surface coating and associated methods
WO2013079853A1 (en) Cmc material part manufacture method
EP2516350B1 (en) Powder mix for dry ramming
IE59006B1 (en) Fibre-reinforced metal matrix composites
FR2939430A1 (en) METHOD FOR SMOOTHING THE SURFACE OF A PIECE OF CMC MATERIAL
EP3728162B1 (en) Process for the manufacture of a ceramic matrix composite part
CA2769075A1 (en) Highly filled particulate composite materials and methods and apparatus for making same
FR2530617A1 (en) METHOD FOR FIXING A FIBER-REINFORCED GLASS MATRIX COMPOSITE MATERIAL TO STRUCTURAL ELEMENTS
FR2679226A1 (en) FIBER MOLDED BODY AND PROCESS FOR PREPARING SAME AND THE USE OF THE MOLDED BODY FOR PREPARING FIBER REINFORCED ALUMINUM FOUNDRY PARTS.
EA001843B1 (en) A method for producing abrasive grains and the abrasive grains produced by this method
WO2016001343A1 (en) Method for producing a part coated with a surface coating comprising an alloy
FR2673940A1 (en) PROCESS FOR PRODUCING A CERAMIC FIBER / CERAMIC MATRIX COMPOSITE.
EP3793963B1 (en) Process for manufacturing a cmc part
FR2645938A1 (en) TRANSFER TUBE
FR2958576A1 (en) Tool such as open mold for forming composite materials in an organic matrix, comprises a refractory concrete comprising mineral aggregates associated with a hydraulic binder having cement and reinforced with fibers
EP0437456B1 (en) Vessel for molten metals, material for such vessel and method for fabricating the material
FR2916992A1 (en) TOOLING USED IN A SUPERPLASTIC FORMING PROCESS
JP2004131318A (en) Joined body of silicon carbide-based member and method of manufacturing the same
EP0672638B1 (en) Thermal insulation material based on alumina fibers and its manufacture
FR3081156A1 (en) PROCESS FOR MANUFACTURING A COATED CMC PART
RU2230628C1 (en) Method for making article of composite metallic material
JPH0429724B2 (en)

Legal Events

Date Code Title Description
ST Notification of lapse