反应烧结碳化硅的显微结构和力学性能分析

Microstructure and Mechanical Properties of Reaction Sintered Silicon Carbide

分析了两种碳化硅的显微结构和力学性能,一种是反应结合碳化硅(reaction boned Silicon Carbide,RBSC);另一种是反应生成碳化硅(reaction formed Silicon Carbide,RFSC)。两种材料均是由硅和碳化硅相组成,但坯体的成分不同。前者坯体中含有原始碳化硅颗粒和碳粉;后者坯体只含有碳粉。研究表明,反应生成碳化硅(RFSC)的结构均匀性更好,三点抗弯强度和强度的韦伯模数更高。

This paper analyzed the microstructure and mechanical properties of two kinds of Silicon Carbide, one is reaction bonded Silicon Carbide(RBSC), the other is reaction formed Silicon Carbide(RFSC).Both materials are composed of silicon and Silicon Carbide phases, but the composition of their green body is different.The former’s green body contains original Silicon Carbide particles and carbon powder, while the latter green body only contains carbon powder.The results show that the structure uniformity of RFSC is better, and its Weber modulus and average three-point bending strength are higher too.