C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
C01B 31/34 (2006.01) C04B 35/56 (2006.01)
Patent
CA 2350576
The invention relates to a method for producing wolfram carbides by gas-phase carburetion of wolfram powders and/or suitable wolfram precursor compounds in powder form at temperatures above 850 ~C. According to the method a CO2/CO mixture with a CO2 content greater than the Boudouard equilibrium content corresponding to the carburetion temperature is used as carburetion gas phase.
Procédé de préparation de carbures de tungstène par carburation en phase vapeur de poudres de tungstène et/ou de poudres liantes précurseurs de tungstène à des températures situées au-dessus de 850 ·C, la phase gazeuse de carburation utilisée étant un mélange de CO¿2?/CO avec une teneur en CO¿2? qui est supérieure à la teneur correspondant à l'équilibre de Boudouard pour la température de carburation.
Bredthauer Jorg
Gille Gerhard
Gries Benno
Fetherstonhaugh & Co.
H.c. Starck Gmbh & Co. Kg
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