Synthesis of submicron grain metal carbides

Details Synthesis of submicron grain metal carbides Synthesis of submicron grain metal carbides

C - Chemistry, Metallurgy

01

B

C01B 31/30 (2006.01)

Patent

CA 2184669

Submicron carbide particles are formed from metal containing precursor compositions where the metal is tantalum, niobium, vanadium or chromium by subjecting the precursor composition to a carbonization reaction. The carbonizing gas contains only hydrogen, nitrogen and carbon and the carbonizing reaction is conducted at a temperature of less than 1100° C. By maintaining the carbon deposition potential of the reaction at from 10% to 60%, the precursor composition can be reduced and carburized simultaneously to form the carbide. The formed product has a physical grain size less than 1 micron which significantly improves its ability to be milled with other compositions, as well as its use in cutting tools and the like.

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