Method of forming tungsten carbide particles

Details Method of forming tungsten carbide particles Method of forming tungsten carbide particles

1996-12-05

1999-07-06

Langel, Wayne

Chemistry of inorganic compounds

Carbon or compound thereof

Binary compound

C01B 3134

Patent

active

059194286

ABSTRACT:
Nanograined tungsten carbide particles are formed by a controlled, simultaneous reduction carburization reaction wherein the kinetics of the carburization and reduction reactions are controlled to permit simultaneous reduction and carburization. The kinetics are controlled by reacting a reduction carburization gas mixture, preferably hydrogen and carbon monoxide by slowly increasing the reaction temperature by controlling the rate of temperature increase. Preferably, the reaction temperature will be increased less than 25.degree. C. per minute, preferably about 1-2 degrees per minute, which prevents the formation of stable, undesirable species such as W.sub.2 C, which in turn interferes with the reaction efficiency.

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