GB1055033A - Improvements in or relating to a solid solution of fine grain carbides - Google Patents

Improvements in or relating to a solid solution of fine grain carbides

Info

Publication number
GB1055033A
GB1055033A GB3596/64A GB359664A GB1055033A GB 1055033 A GB1055033 A GB 1055033A GB 3596/64 A GB3596/64 A GB 3596/64A GB 359664 A GB359664 A GB 359664A GB 1055033 A GB1055033 A GB 1055033A
Authority
GB
United Kingdom
Prior art keywords
metals
solid solution
tic
oxides
carbides
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
GB3596/64A
Inventor
Edith Clar
Rene Antoine Paris
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.)
Pechiney SA
Original Assignee
Pechiney SA
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 Pechiney SA filed Critical Pechiney SA
Publication of GB1055033A publication Critical patent/GB1055033A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/05—Mixtures of metal powder with non-metallic powder
    • C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
    • C22C1/053—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor with in situ formation of hard compounds
    • C22C1/056—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor with in situ formation of hard compounds using gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/90—Carbides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/50—Solid solutions
    • C01P2002/52—Solid solutions containing elements as dopants
    • C01P2002/54—Solid solutions containing elements as dopants one element only
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/80—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
    • C01P2002/88—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70 by thermal analysis data, e.g. TGA, DTA, DSC
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/80—Compositional purity

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Inorganic Chemistry (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Catalysts (AREA)

Abstract

Compositions of sub-micronic grain dimensions consist of a solid solution of the carbides of at least 2 of the following: Ti, V and Ta, with or without one or more of the following in addition to the solid solution: free carbon, the carbide of one of the metals of the solid solution and an oxide of such a metal. Sintered materials may be prepared from these compositions alone or together with one or more metals or oxides. The compositions may also be mixed with powdered oxides to yield cermet materials or with metals or alloys to provide articles with surface-hardened portions.ALSO:A composition of sub-micronic grain dimensions consists of a solid solution of at least two of the carbides of Ti, Ta and V, with or without one or more of the following free carbon, the carbide of a metal forming part of the solution and an oxide of such a metal. The solution may be prepared by passing a mixture of H2 and CH4 at a temperature of less than 1050 DEG C. over oxides of the appropriate metals, which oxides themselves may be prepared by the pyrolysis in an inert or reducing atmosphere of organic salts of these metals. The pyrolysis is preferably carried out below 500 DEG C., using a H2/CH4 atmosphere. For the carburization, which may be carried out in a fixed or fluidized bed, the CH4 content of the H2/CH4 mixture may be less than 10%. The gases may be recycled after carburization. The solutions may contain up to 10% of carbides of other transition metals, e.g. W, Mo and Nb incorporated by adding organic salts of these metals to the salts of Ti, Ta or V. The solutions may be incorporated in sintered articles, cermet materials, metals or alloys and may be used as catalysts, catalyst supports or in catalytic mixtures. Examples are given of the preparation of TiC/TaC, TiC/VC, TaC/VC and TiC/TiC/VC solid solutions.
GB3596/64A 1964-01-28 1964-01-28 Improvements in or relating to a solid solution of fine grain carbides Expired GB1055033A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE643055A BE643055A (en) 1964-01-28 1964-01-28

Publications (1)

Publication Number Publication Date
GB1055033A true GB1055033A (en) 1967-01-11

Family

ID=3845823

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3596/64A Expired GB1055033A (en) 1964-01-28 1964-01-28 Improvements in or relating to a solid solution of fine grain carbides

Country Status (2)

Country Link
BE (1) BE643055A (en)
GB (1) GB1055033A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2203421A (en) * 1987-04-10 1988-10-19 Nat Res Dev Making carbides of high-melting metals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2203421A (en) * 1987-04-10 1988-10-19 Nat Res Dev Making carbides of high-melting metals

Also Published As

Publication number Publication date
BE643055A (en) 1964-07-28

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