Preparation of porous silicon carbide by combustion synthesis^①

来源期刊：中南大学学报(英文版)2005年第2期

论文作者：张宇民 张剑寒 韩杰才

文章页码：163 - 166

Key words：combustion synthesis; silicon carbide; ceramic

Abstract: Porous silicon carbide ceramics were prepared by combustion synthesis technique. SiC/TiC composite was gained by combustion reaction of Si, C and Ti. Thermodynamics analysis of Si-C-Ti system indicates that the content of TiC in products should be larger than 30%. The experimental results show that the content of Ti+C should be larger than 25% to achieve a complete combustion reaction. The X-ray diffractometry results show that the final products with a relative density of 45% 64% are composed ofα-SiC,β-SiC, TiC and a small quantity of Si.The images of scanning electron microscopy show that the structures of grain in SiC based porous ceramics consist of particles with a few microns in size.