Preparation of Amorphous Si-B-C-N Powders and Nano-Sized Ceramics

摘要

Amorphous nano-sized silicoboron carbonitride (Si-B-C-N) powders with average grain size < 50 nm were fabricated by high energy shaker mill using hexagonal boron nitride, graphite and amorphous silicon powders as starting materials. The powders were consolidated by spark plasma sintering at 1900° and 1950℃. Amorphous phase were partially retained in ceramic sintered at 1900℃. For ceramic sintered at 1950℃, amorphous Si-B-C-N ceramic transferred to hexagonal BN and cubic SiC.