DE4403398A1 - Fibre reinforced ceramic component prodn. - Google Patents

Fibre reinforced ceramic component prodn.

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Publication number
DE4403398A1
DE4403398A1 DE4403398A DE4403398A DE4403398A1 DE 4403398 A1 DE4403398 A1 DE 4403398A1 DE 4403398 A DE4403398 A DE 4403398A DE 4403398 A DE4403398 A DE 4403398A DE 4403398 A1 DE4403398 A1 DE 4403398A1
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Germany
Prior art keywords
ceramic
infiltration
subsequent
fiber
components
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DE4403398A
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German (de)
Inventor
Hartmut Dipl Chem Dr Greulich
Heinz Dr Pfeiffer
Heinz-Guenther Trost
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MT Aerospace AG
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MAN Technologie AG
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Priority to DE4403398A priority Critical patent/DE4403398A1/en
Priority to FR9501010A priority patent/FR2715930A1/en
Priority to IT95TO000067A priority patent/IT1278352B1/en
Publication of DE4403398A1 publication Critical patent/DE4403398A1/en
Withdrawn legal-status Critical Current

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    • 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
    • C04B35/628—Coating the powders or the macroscopic reinforcing agents
    • C04B35/62884—Coating the powders or the macroscopic reinforcing agents by gas phase techniques
    • 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
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
    • C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
    • C04B35/571—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide obtained from Si-containing polymer precursors or organosilicon monomers
    • 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
    • C04B35/628—Coating the powders or the macroscopic reinforcing agents
    • C04B35/62844—Coating fibres
    • C04B35/62857—Coating fibres with non-oxide ceramics
    • C04B35/62873—Carbon
    • 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
    • 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
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/48—Organic compounds becoming part of a ceramic after heat treatment, e.g. carbonising phenol resins
    • 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
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C04B2235/616—Liquid infiltration of green bodies or pre-forms

Abstract

To produce a fibre-reinforced ceramic component, the fibres or fibre strands of the component are either coated with carbon or other material, or the shaped preform is heated at a high temp. for a ceramic matrix to be applied in a fluid phase full infiltration together with pyrolysis stages.

Description

Die Erfindung bezieht sich auf ein Verfahren zur Herstellung faserverstärkter Keramikbauteile durch Vorfixierung bei Flüssigphasenvollinfiltration.The invention relates to a method for producing fiber-reinforced Ceramic components through pre-fixation in liquid phase infiltration.

Faserverstärkte Keramikbauteile sind aufgrund ihrer hohen spezifischen Festigkeiten und gleichzeitig hohen Quasiduktilität, d. h. hinsichtlich ihrer Zuverlässigkeit und Schadenstoleranz, monolithischen Keramikbauteilen überlegen: Sie sind daher für den Einsatz in wechselbelasteten Strukturbauteilen bei hohen Temperaturen besonders geeignet.Fiber-reinforced ceramic components are due to their high specific strengths and at the same time high quasi-ductility, d. H. in terms of their reliability and Damage tolerance, superior to monolithic ceramic components: They are therefore for the Use in structural components subject to alternating loads, especially at high temperatures suitable.

Faserverstärkte Keramikbauteile können bekanntermaßen nach einem CVI-Verfahren (Chemical Vapour Infiltration) hergestellt werden, bei dem eine keramische Matrix in ein Gelege aus Keramik- (beispielsweise SiC) oder aus Kohlenstoff-Fasern aus der Gasphase abgeschieden wird, oder durch Flüssigphasenvollinfiltration, bei der vorge­ legte Faserkörper mit sogenannten Keramikpräkursoren, das sind flüssige siliziumorga­ nische Verbindungen, infiltriert und durch anschließende thermische Behandlung (Pyrolyse) in eine keramische Matrix umgewandelt werden.As is known, fiber-reinforced ceramic components can be produced using a CVI process (Chemical Vapor Infiltration), in which a ceramic matrix in a fabric made of ceramic (for example SiC) or carbon fibers from the Gas phase is separated, or by full liquid phase infiltration, in the pre laid fiber bodies with so-called ceramic precursors, which are liquid silicon organs African compounds, infiltrated and by subsequent thermal treatment (Pyrolysis) can be converted into a ceramic matrix.

Es ist auch bekannt, daß sich gute mechanische Eigenschaften bei Flüssigphasenvollin­ filtration nur mit Fasern erzielen lassen, die zuvor mit bestimmten Substanzen be­ schichtet worden sind. Am besten hat sich dabei eine Kohlenstoff-Beschichtung be­ währt.It is also known that good mechanical properties are found in liquid phases Filtration can only be achieved with fibers that were previously with certain substances have been stratified. A carbon coating is best lasts.

Dabei wird die Faserbeschichtung bisher wie folgt durchgeführt:The fiber coating has so far been carried out as follows:

  • - Beschichtung der Faser im fertigen, aber noch nicht vorfixierten Gewebe oder- Coating the fiber in the finished but not yet pre-fixed fabric or
  • - Beschichtung des Faserstranges vor dem Weben oder Wickeln.- Coating the fiber strand before weaving or winding.

Durch die Beschichtung werden Gewebe bzw. Faserstrang erheblich steifer, so daß mit wachsender Schichtdicke die Weiterverarbeitung, z. B. Weben, Ablegen oder Wickeln, zunehmend eingeschränkt wird. Schließlich werden die beschichteten Gewebe so steif, daß sie sich nur noch zu weitgehend ebenen Bauteilen, z. B. Platten, weiterverarbeiten lassen.The coating makes the fabric or fiber strand considerably stiffer, so that with growing layer thickness the further processing, e.g. B. weaving, laying down or winding, is increasingly restricted. Finally, the coated fabrics become so stiff that they only become largely flat components, e.g. B. plates, further process to let.

Der Erfindung liegt die Aufgabe zugrunde, das Verfahren der eingangs genannten Art so zu verbessern, daß Bauteile verfahrenstechnisch einfach und wirtschafflich herge­ stellt werden können, wobei die Formgebung nahezu uneingeschränkt ist.The invention has for its object the method of the type mentioned to be improved so that components are technically simple and economical can be provided, the shape is almost unlimited.

Die Aufgabe wird erfindungsgemäß durch die Maßnahmen des Anspruches 1 gelöst: Damit wird das Bauteil mit den bisher bekannten Verfahren der Vorfixierung, d. h. Formgebung mit unbeschichteten Fasersträngen bzw. Geweben, hergestellt, und erst in einem nachfolgenden Verfahrensschritt werden die Fasern mit Kohlenstoff bzw. anderen Substanzen beschichtet, was vorzugsweise durch Pyrolyse organischer Sub­ stanzen erreicht wird. Wahlweise kann die vorfixierte Preform einer Hochtemperatur­ behandlung unterzogen werden. Schließlich wird die keramische Matrix durch Flüssig­ phasenvollinfiltration mit anschließender Pyrolyse eingebracht die, falls erforderlich, nachverdichtet werden kann.According to the invention, the object is achieved by the measures of claim 1: So that the component with the previously known methods of prefixing, ie. H. Shaping with uncoated fiber strands or fabrics, manufactured, and only in in a subsequent process step, the fibers are coated with carbon or other substances coated, which is preferably by pyrolysis of organic sub punching is achieved. Optionally, the pre-fixed high temperature preform undergo treatment. Eventually the ceramic matrix becomes liquid full phase infiltration followed by pyrolysis which, if necessary, can be compressed.

Mit dem als vorteilhaft erkannten Verfahren wurden Versuchsbauteile aus faserver­ stärkter Keramik hergestellt. Damit wurde das erfindungsgemäße Prinzip mit den an­ gegebenen Verfahrensschritten ausgeführt und die gezielte Einstellung der Werkstück­ eigenschaften erreicht. Nachfolgend werden drei Ausführungsbeispiele beschrieben.With the process, which was recognized as advantageous, test components were made from fiber-reinforced plastics made of stronger ceramics. The principle according to the invention was thus adopted given process steps and the targeted setting of the workpiece properties achieved. Three exemplary embodiments are described below.

Beispiel 1:Example 1:

Durch Ablegen von Kohlenstoffgeweben auf eine Ablegeform wurde unter Einbringung pulverförmiger Feststoffe und anschließender Temperaturbehandlung eine vorfixierte Preform hergestellt. In diese poröse Preform wurde eine Epoxidharzlösung mittels Vakuumtechnik infiltriert. Das Harz wurde bei ca. 150° C für ca. 2 Stunden gehärtet und anschließend in einer Hochtemperaturbehandlung bei ca. 1500° C für ca. 10 Stunden unter Argonatmosphäre pyrolysiert.By placing carbon fabrics on a laying mold, was under Introduction of powdery solids and subsequent heat treatment pre-fixed preform manufactured. An epoxy resin solution was placed in this porous preform infiltrated using vacuum technology. The resin was at about 150 ° C for about 2 hours hardened and then in a high temperature treatment at approx. 1500 ° C for approx. Pyrolyzed for 10 hours under an argon atmosphere.

In den vorfixierten Körper wurde unter Druck im Autoklaven ein Polysiloxan infil­ triert, das bei ca. 200° C für ca. 3 Stunden gehärtet und danach bei ca. 1100° C mit einer Haltezeit von ca. 4 Stunden pyrolysiert wurde. A polysiloxane was infiltrated into the pre-fixed body under pressure in an autoclave triert that hardened at about 200 ° C for about 3 hours and then at about 1100 ° C with a holding time of about 4 hours was pyrolyzed.  

Nach drei Nachverdichtungsschritten, bestehend aus Infiltration, Härtung und Pyrolyse des Si-Precursors, wurden an Materialproben zufriedenstellende mechanische Eigen­ schaften erhalten.After three post-compaction steps, consisting of infiltration, hardening and pyrolysis of the Si precursor, were satisfactory mechanical properties on material samples preserved.

Beispiel 2: (Fig. 1)Example 2: ( Fig. 1)

Zur Herstellung faserverstärkter Triebwerkdüsen wird ein Endlosfaden 1 auf einen Kern 2 gewickelt. Dieser Endlosfaden 1 wurde zuvor durch ein Tränkbad 3 mit einer Phenolharzlösung gezogen.To produce fiber-reinforced engine nozzles, an endless thread 1 is wound on a core 2 . This continuous thread 1 was previously drawn through a soaking bath 3 with a phenolic resin solution.

Nach Fertigstellung des Fasergeleges wird dieses gemeinsam mit dem Kern 2 in einem Umluftofen bei ca. 200°C für ca. 2 Stunden gehärtet. Nach dem Abkühlen wird das Bauteil entformt und einer anschließenden Pyrolyse bei ca. 900°C mit ca. 10 Stunden Haltezeit im Schutzgas unterzogen. Dabei wird das Phenolharz in Kohlenstoff umgewandelt; durch den gleichzeitigen Masse- und Volumenschwund des Harzes wird das Bauteil sehr porös.After completion of the fiber fabric, this is cured together with the core 2 in a forced air oven at approx. 200 ° C for approx. 2 hours. After cooling, the component is removed from the mold and subjected to a subsequent pyrolysis at approx. 900 ° C with a holding time of approx. 10 hours in the protective gas. The phenolic resin is converted into carbon; due to the simultaneous loss of mass and volume of the resin, the component becomes very porous.

Die so erzielte 40%ige Porosität des Bauteils ermöglicht es, die verarbeiteten Fasern durch eine CVD-Behandlung (Chemical Vapour Deposition) mit Kohlenstoff zu beschichten. Dieser Verfahrensschritt ist notwendig, um auf die Fasern eine Gleit­ schicht aufzubringen. Erst diese Gleitschicht macht das Material nach Einbringung der keramischen Matrix quasiduktil.The 40% porosity of the component thus achieved enables the processed fibers through a CVD (Chemical Vapor Deposition) treatment with carbon coat. This process step is necessary to glide on the fibers apply layer. Only this sliding layer makes the material after the ceramic matrix quasiductile.

Nach der CVD-Beschichtung hat die Porosität des Bauteils nur um etwa 1% bis 2% abgenommen: Das poröse Fasergelege kann daher durch Vakuuminfiltration mit einem Silazanharz gefüllt werden. Nach Härtung dieses Silazans bei ca. 200°C für ca. 2 Stunden wird das Bauteil erneut einer Pyrolyse unterzogen. Dabei wird das Silazanharz in eine keramische Matrix umgewandelt, womit die Triebwerksdüse prinzipiell fertig ist.After the CVD coating, the porosity of the component has only around 1% to 2% removed: The porous fiber fabric can therefore be vacuum infiltrated with a Silazane resin can be filled. After curing this silazane at approx. 200 ° C for approx. The component is again subjected to pyrolysis for 2 hours. It will Silazane resin converted into a ceramic matrix, making the engine nozzle is basically finished.

Um die mechanischen Eigenschaften des Bauteils zu verbessern, können weitere Sila­ zaninfiltrationen mit anschließender Härtung und Pyrolyse angeschlossen werden. In order to improve the mechanical properties of the component, additional sila zanin filtration followed by curing and pyrolysis.  

Beispiel 3: (Fig. 2)Example 3: ( Fig. 2)

Zur Herstellung von Gleitringen in Pumpendichtungen wird zunächst ein etwa 100 mm breites, mit einer Phenolharzlösung getränktes SiC-Gewebeband 12 auf einen Dorn 11 gewickelt, das Phenolharz, wie im Beispiel 2 beschrieben, gehärtet und nach der Ent­ fernung des Dorns der Faserzylinder pyrolisiert.To produce slide rings in pump seals, an approximately 100 mm wide, soaked with a phenolic resin SiC fabric tape 12 is wound on a mandrel 11 , the phenolic resin, as described in Example 2, cured and pyrolyzed after removal of the mandrel from the fiber cylinder.

Die Gewebefasern des Faserzylinders werden dann, wie im Beispiel 2 beschrieben, in einem CVD-Verfahren mit Kohlenstoff beschichtet.The fabric fibers of the fiber cylinder are then, as described in Example 2, in a carbon-coated CVD process.

Danach wird eine Carbosilanlösung in einer Druckapparatur in das Fasergelege ge­ drückt. Nach erneuter Pyrolyse bei ca. 1.000°C mit ca. 2 Stunden Haltezeit und anschließender Abkühlung werden von dem Keramikzylinder jeweils 10 mm breite Ringe abgestochen. Die Oberfläche dieser Ringe wird mit einem Schlicker versiegelt, der aus einem Carbosilan und SiC-Pulver besteht. Die geforderte Oberflächenhärte der Gleitringe wird durch eine abschließende CVD-Beschichtung mit SiC erreicht. Zuletzt werden die Gleitringe geschliffen.Then a carbosilane solution is placed in a printing apparatus in the fiber fabric presses. After pyrolysis again at approx. 1,000 ° C with a holding time of approx. 2 hours and Subsequent cooling are each 10 mm wide from the ceramic cylinder Rings cut. The surface of these rings is sealed with a slip, which consists of a carbosilane and SiC powder. The required surface hardness of the Slip rings are achieved by a final CVD coating with SiC. Last the slide rings are ground.

Claims (7)

1. Verfahren zur Herstellung faserverstärkter Keramikbauteile mit nahezu keiner Einschränkung in der Formgebung, bei dem Bauteile aus unbeschichteten Geweben bzw. Fasersträngen nach den bisher bekannten Verfahren der Vorfixie­ rung hergestellt werden, dadurch gekennzeichnet, daß die Fasern bzw. Faser­ stränge der so erzeugten Bauteile nachfolgend entweder mit Kohlenstoff bzw. anderen Substanzen beschichtet werden oder die vorfixierte Preform einer Hoch­ temperaturbehandlung unterzogen wird und zuletzt eine keramische Matrix in dieses Bauteil durch Flüssigphasenvollinfiltration mit anschließenden Pyroly­ seschritten eingebracht wird.1. A process for the production of fiber-reinforced ceramic components with almost no limitation in shape, in which components from uncoated fabrics or fiber strands are produced by the previously known methods of prefixing, characterized in that the fibers or fiber strands of the components thus produced subsequently either coated with carbon or other substances or the pre-fixed preform is subjected to a high temperature treatment and finally a ceramic matrix is introduced into this component by full liquid phase infiltration with subsequent pyrolysis steps. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Preform über Wickeln von Rovings oder Gewebebahnen oder Ablegen von UD-(Unidirektional) Gelegen bzw. Geweben unter Verwendung der Naßlaminier-, Wickel-, Prepreg- oder Naßinfiltrationstechnik hergestellt wird.2. The method according to claim 1, characterized in that the preform over Wrapping rovings or fabric webs or depositing UD (unidirectional) Laid or woven fabrics using the wet laminating, wrapping, prepreg or wet infiltration technology is manufactured. 3. Verfahren nach Anspruch 1 bis 2, dadurch gekennzeichnet, daß die Vorfixierung durch Tränkung oder Einbringung pulverförmiger Feststoffe mit vorzugsweise anschließender Temperaturbehandlung, wie z. B. Pyrolyse, erzeugt wird.3. The method according to claim 1 to 2, characterized in that the pre-fixation by impregnation or introduction of powdery solids with preferably subsequent heat treatment, such as B. pyrolysis is generated. 4. Verfahren nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß die Beschichtung der Fasern in der vorfixierten Preform durch
  • - CVD (Chemical Vapour Deposition)/ CVI (Chemical Vapour Infiltration) oder
  • - Einbringung flüssiger Substanzen und anschließende Temperaturbehandlung oder
  • - Hochtemperaturbehandlung der vorfixierten Preform erfolgt.
4. The method according to claim 1 to 3, characterized in that the coating of the fibers in the pre-fixed preform
  • - CVD (Chemical Vapor Deposition) / CVI (Chemical Vapor Infiltration) or
  • - Introduction of liquid substances and subsequent temperature treatment or
  • - High-temperature treatment of the pre-fixed preform is carried out.
5. Verfahren nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß eine keramische Matrix durch Flüssigphasenvollinfiltration von siliziumorganischen Verbindungen mit anschließenden Härtungs- und Pyrolyseschritten eingebracht wird.5. The method according to claim 1 to 4, characterized in that a ceramic Matrix through liquid phase infiltration of organosilicon compounds is introduced with subsequent curing and pyrolysis steps. 6. Verfahren nach Anspruch 1 bis 5, dadurch gekennzeichnet, daß die Nachverdich­ tung der nach Anspruch 5 hergestellten Keramik ebenfalls mittels Flüssig­ phasenvollinfiltration durchgeführt wird.6. The method according to claim 1 to 5, characterized in that the post-compression tion of the ceramic produced according to claim 5 also by means of liquid full phase infiltration is carried out. 7. Verfahren nach Anspruch 1 bis 5, dadurch gekennzeichnet, daß die Nachver­ dichtung der nach Anspruch 5 hergestellten Keramik mittels CVI-Verfahren durchgeführt wird.7. The method according to claim 1 to 5, characterized in that the Nachver Seal the ceramic produced according to claim 5 by means of CVI processes is carried out.
DE4403398A 1994-02-04 1994-02-04 Fibre reinforced ceramic component prodn. Withdrawn DE4403398A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE4403398A DE4403398A1 (en) 1994-02-04 1994-02-04 Fibre reinforced ceramic component prodn.
FR9501010A FR2715930A1 (en) 1994-02-04 1995-01-30 Process for making fiber-reinforced ceramic parts by prefixing with total infiltration in the liquid phase.
IT95TO000067A IT1278352B1 (en) 1994-02-04 1995-02-03 PROCESS FOR THE PRODUCTION OF CERAMIC ARTICLES REINFORCED BY FIBERS BY PREFIXING WITH COMPLETE INFILTRATION IN THE LIQUID PHASE

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DE4403398A DE4403398A1 (en) 1994-02-04 1994-02-04 Fibre reinforced ceramic component prodn.

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DE4403398A1 true DE4403398A1 (en) 1995-08-10

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FR (1) FR2715930A1 (en)
IT (1) IT1278352B1 (en)

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DE10204860A1 (en) * 2002-02-06 2003-08-14 Man Technologie Gmbh Fiber composite ceramic material, used e.g. for heat engine, heat exchanger, hot gas pipe or nozzle or plasma containing vessel, has heat-conducting three-dimensional fabric with silicon carbide matrix produced in three stages

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US5067999A (en) * 1990-08-10 1991-11-26 General Atomics Method for providing a silicon carbide matrix in carbon-fiber reinforced composites
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EP0555130A1 (en) * 1992-02-04 1993-08-11 Societe Europeenne De Propulsion Method of making composite material parts having a ceramic matrix
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FR2715930A1 (en) 1995-08-11
ITTO950067A0 (en) 1995-02-03
IT1278352B1 (en) 1997-11-20
ITTO950067A1 (en) 1996-08-03

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