Manufacture of titanium carbide, nitride and carbonitride whiske

Details Manufacture of titanium carbide, nitride and carbonitride whiske Manufacture of titanium carbide, nitride and carbonitride whiske

1996-12-20

2000-08-29

Garrett, Felisa

Single-crystal, oriented-crystal, and epitaxy growth processes;

Forming from vapor or gaseous state

Forming a platelet shape or a small diameter, elongate,...

117 75, 117 76, 117921, 423345, C30B 2962

Patent

active

06110275&

ABSTRACT:
There is disclosed a method of producing, in large volume and at low cost, titanium carbide, nitride and carbonitride whiskers, with preferably submicron diameters, to be used as reinforcing material. The whiskers are suitable for use as a reinforcement material in a wide range of materials, including metals, intermetallics, plastics, ceramics and metallic bonded hard material. Titanium oxide, hydroxide or alkali compounds thereof are mixed with a carbon source with a volatile part which volatiles at temperatures exceeding 500.degree. C. and in an amount to satisfy the stoichiometric requirements of the carbide or nitride. A halogenide salt is used as a volatilization agent for titanium as well as a catalyst able to dissolve Ti plus C and/or N, such as Ni or Co. The reactant powders are blended in some typical manner, e.g., by using a high speed blender so as to intimately mix them. Finally, the mixed starting material is subjected to nitriding, carbonizing or carbonitriding heat treatments in order to produce the desired whiskers.

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