GB839326A - Improvements relating to hard ceramic materials - Google Patents

Improvements relating to hard ceramic materials

Info

Publication number
GB839326A
GB839326A GB2590556A GB2590556A GB839326A GB 839326 A GB839326 A GB 839326A GB 2590556 A GB2590556 A GB 2590556A GB 2590556 A GB2590556 A GB 2590556A GB 839326 A GB839326 A GB 839326A
Authority
GB
United Kingdom
Prior art keywords
less
ceramic materials
improvements relating
hard ceramic
microns
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.)
Expired
Application number
GB2590556A
Inventor
Richard Malcolm Gill
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.)
Unifrax 1 LLC
Original Assignee
Carborundum Co
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 Carborundum Co filed Critical Carborundum Co
Priority to GB2590556A priority Critical patent/GB839326A/en
Publication of GB839326A publication Critical patent/GB839326A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C04B35/42—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 chromites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
    • B23B27/148—Composition of the cutting inserts
    • 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
    • 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
    • C04B35/12—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 chromium 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
    • C04B35/01—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
    • C04B35/44—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 aluminates

Abstract

Hard, dense, ceramic compositions which may be moulded to exact size without shrinkage, e.g. for use as cutting tools, dies, and guides, are prepared by hot pressing, at 1400 DEG to 1700 DEG C. and preferably at 1000 to 5000 p.s.i., a mixture of 40% to less than p 95% of substantially pure alpha alumina and more than 5% and up to 60% of chromium sesquioxide, both substances having a particle size of less than 10 microns. The alumina may be replaced in part by 1% to 70% by weight of one or more of the metals chromium, tungsten, molybdenum, iron, manganese, cobalt and nickel, of particle size less than 15 microns, but must be present in at least 20% by weight of the composition.
GB2590556A 1956-08-24 1956-08-24 Improvements relating to hard ceramic materials Expired GB839326A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2590556A GB839326A (en) 1956-08-24 1956-08-24 Improvements relating to hard ceramic materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2590556A GB839326A (en) 1956-08-24 1956-08-24 Improvements relating to hard ceramic materials

Publications (1)

Publication Number Publication Date
GB839326A true GB839326A (en) 1960-06-29

Family

ID=10235243

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2590556A Expired GB839326A (en) 1956-08-24 1956-08-24 Improvements relating to hard ceramic materials

Country Status (1)

Country Link
GB (1) GB839326A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3080135A (en) * 1960-12-07 1963-03-05 Du Pont Textile apparatus
US3192058A (en) * 1962-05-23 1965-06-29 Harbison Walker Refractories Refractories and methods of manufacture therefor
US4900698A (en) * 1987-05-26 1990-02-13 W. R. Grace & Co.-Conn. Ceramic product and process

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3080135A (en) * 1960-12-07 1963-03-05 Du Pont Textile apparatus
US3192058A (en) * 1962-05-23 1965-06-29 Harbison Walker Refractories Refractories and methods of manufacture therefor
US4900698A (en) * 1987-05-26 1990-02-13 W. R. Grace & Co.-Conn. Ceramic product and process

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