METHOD FOR PRODUCING TUNGSTEN CARBIDE NANOPOWDER Russian patent published in 2018 - IPC C01B32/949 C01G41/00 C22B34/36 B22F9/20 B82Y30/00 

FIELD: chemistry.

SUBSTANCE: invention relates to the production of tungsten carbide nanopowder. Method comprises the reduction and carbidization of tungsten trioxide (WO₃) in the thermal plasma of an arc plasma generator to produce tungsten carbide (WC) nanoparticles. Mixture containing 65.0–70.0 wt% of the tungsten trioxide powder and 30.0–35.0 wt% of graphite as a reducing agent and a carbidizer is prepared. Resultant mixture is ground to obtain a consistent powder with particle sizes of less than 30 mcm. Reduction and carbidization of tungsten trioxide is carried out by feeding a flow of inert plasma-forming gas with a powder sprayed therein into the thermal plasma of an arc plasma generator with a temperature of 10,000–12,000 K at the outlet of the plasma generator. Preparation of tungsten carbide nanoparticles is provided by crystallization on the walls of the plasma generator.

EFFECT: increased physicomechanical properties of tungsten carbide, which allow it to be used to produce hard alloys, are provided.

1 cl, 1 tbl, 5 ex