METHOD OF PRODUCING SILICON CARBIDE NANOPOWDER

摘要

FIELD: process engineering.SUBSTANCE: invention relates to powder metallurgy, particularly, to production of silicon carbide nanopowders. It may be used for production of abrasive and cutting materials, structural ceramics and crystals for microelectronics, catalysts and protective coatings. Initial mix of silicon and carbon powders at molar ratio of reagents equal to 1 is subjected to hard mixing in high-rpm planetary-ball mil for 10-15 minutes in atmosphere of inert gas at 1-5 atm. Weight of balls relates to weight of initial mix in aforesaid mill as (40):1. Diameter of balls makes 2-8 mm while mill drum rpm equals 1800-2500. Mix of silicon and carbon composite nanoparticles is placed in atmosphere of inert gas at 5-20 atm and 300 K to initiate reaction of silicon carbine nanopowders production reaction in self-propagating high-temperature synthesis.EFFECT: high-phase-purity powder.4 cl, 1 tbl