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1. (WO1979000089) PROCESS FOR THE PREPARATION OF A MATERIAL BASED ON METAL CARBIDES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1979/000089 International Application No.: PCT/EP1978/000004
Publication Date: 22.02.1979 International Filing Date: 27.07.1978
IPC:
C01B 31/34 (2006.01) ,C04B 35/56 (2006.01) ,C22C 29/06 (2006.01) ,H01M 4/90 (2006.01)
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
31
Carbon; Compounds thereof
30
Carbides
34
Tungsten or molybdenum carbides
C CHEMISTRY; METALLURGY
04
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
B
LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
35
Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
515
based on non-oxides
56
based on carbides
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
29
Alloys based on carbides, oxides, borides, nitrides or silicides, e.g. cermets, or other metal compounds, e. g. oxynitrides, sulfides
02
based on carbides or carbonitrides
06
based on carbides, but not containing other metal compounds
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4
Electrodes
86
Inert electrodes with catalytic activity, e.g. for fuel cells
90
Selection of catalytic material
Applicants:
Inventors:
Priority Data:
9725/7709.08.1977CH
Title (EN) PROCESS FOR THE PREPARATION OF A MATERIAL BASED ON METAL CARBIDES
(FR) PROCEDE POUR LA PREPARATION D"UN MATERIAU A BASE DE CARBURES METALLIQUES
Abstract:
(EN) A process for the preparation of an extrahard material based on tungsten and molybdenum carbides and having a hexagonal crystal structure identical with that of tungsten carbide. According to this process, one heats between 1000 C and a temperature Tx, which is lower than the maximum stability limit of the MoxW1-xC phase wherein 0.01 x 1, a mixture, intimate to the molecular or atomic scale, of tungsten and molybdenum the total content of which in Fe, Ni and Co does not exceed 0.1% with carbon and/or a carbon compound. Tx is defined as follows: For 0.01 < x < 0.8, Tx = 2700 - 1375x C; For 0.8 < x < 1, Tx = 3400 - 2250x C.
(FR) Un procede pour la preparation d"un materiau extra-dur a base de carbures de tungstene et de molybdene et ayant une structure cristalline hexagonale identique a celle du carbure de tungstene. Selon ce procede, l"on chauffe entre 1000 C et une temperature Tx, inferieure a la limite de stabilite maximum de la phase MoxW1-xC, ou 0.01 x 1, un melange moleculaire ou atomique de tungstene et de molybdene dont le contenu total en Fe, Ni et Co ne depasse pas 0,1%, avec du carbone et/ou un compose carbone. Tx est definie comme suit: Pour 0,01 < x < 0,8, Tx = 2700 - 1375x C; Pour 0,8 < x < 1, Tx = 3400 - 2250x C.
Designated States:
Publication Language: German (DE)
Filing Language: German (DE)
Also published as:
EP0166586EP0301169US4330332US4719056DE000003522702GB2161089
GB2192560DK279985