METHOD FOR PRODUCING POWDER METAL MATRIX COMPOSITE FROM COPPER AND SILICON CARBIDE Russian patent published in 2023 - IPC B22F9/22 B82B1/00 

FIELD: composite materials; metal matrix composites.

SUBSTANCE: invention can be used in powder metallurgy, mechanical engineering and instrument making. The method for producing a powder metal matrix composite from copper and silicon carbide consists in generating an arc discharge and electric discharge plasma into a chamber previously evacuated and filled with argon at normal atmospheric pressure and room temperature, at a charging voltage of 3 kV of a capacitor bank with a capacity of 7.2 mF, using a coaxial magnetoplasma accelerator with a copper cylindrical electrically conductive barrel and a composite central electrode made of a copper tip and a brass shank. Between the copper cylindrical electrically conductive accelerator barrel and the copper tip of the central electrode, an electrically fusible bridge made of compressed silicon carbide powder with a particle size of no more than 8 microns weighing from 0.125 to 0.500 g is preliminarily placed on top of a conductive carbon layer deposited on the surface of the insulator separating the electrically conductive barrel from the central electrode. After cooling, the finished product is collected from the inner walls of the chamber.

EFFECT: obtaining a powder composite without impurities, containing a large fraction of copper particles up to 50 microns in size and a highly dispersed component with nanoparticle sizes up to 100 nm, including mainly SiC.

1 cl, 3 dwg