Si₃N₄-SiC Composite Consolidated by Post-HIPing Process

Abstract

Si₃N₄-SiC particle composites constaining up to 30wt% SiC were sintered to a neary full density using gas pressure sintering and HIPing process (post-HIPing). Fine SiC powder with an average particle size of about 0.03μm, and Y₂O₃ as sintering additive were used. Si₃N₄-30wt% SiC sintered composite with a strength of about 700MPa at 1400°C was obtained by post-HIPing.