METHOD FOR PRODUCING POWDER CONTAINING NANOCRYSTALLINE CUBIC TUNGSTEN CARBIDE Russian patent published in 2021 - IPC C01B32/949 B82Y30/00 

FIELD: materials science; nanotechnology.

SUBSTANCE: invention relates to the field of materials science and nanotechnology, and in particular to a method for producing a powder containing nanocrystalline cubic tungsten carbide. The method includes preliminary evacuation of the chamber, filling it with argon at normal atmospheric pressure and room temperature. Tungsten and carbon-containing electric discharge plasma is generated using a coaxial magnetoplasma accelerator with a graphite barrel and a composite central electrode made of a tip made of graphite and a shank made of steel, with an electrically fusible bridge made of a compressed mixture of metallic tungsten and carbon black, placed between the graphite barrel and tip, at a charging voltage of 3.0 kV of a capacitor bank with a capacity of 6 mF. The method is carried out in three stages. At the first stage, electric-discharge plasma is generated using an electrically fusible bridge from a pressed mixture of metallic tungsten and carbon black, taken in a W: C ratio of 0.70: 0.30. The resulting powdery material is collected, pressed and used in the second stage as an electrically fusible jumper, placed between the graphite barrel and the tip, the chamber is evacuated, filled with argon at normal atmospheric pressure and room temperature, and electric discharge plasma is generated at a charging voltage of 2.5 kV of a capacitor batteries. The powdery material obtained at the previous stage is collected, pressed and used at the third stage as an electrically fusible jumper, placed between the graphite barrel and the tip, the chamber is evacuated, filled with argon at normal atmospheric pressure and room temperature, and an electric-discharge plasma is generated at a charging voltage of 2, 0 kV capacitor bank.

EFFECT: proposed method allows obtaining a powder containing nanocrystalline cubic tungsten carbide with a particle size of up to 10 nm.

1 cl, 3 dwg, 1 tbl