渗硅碳化硅材料的研究

Study on Reaction of Si,R,Si-SiC

本文通过调整生坯结构 ,研究了全碳粉渗硅碳化硅 (PCRBSC)的显微结构及力学性能。实验结果表明 :生坯结构影响烧结体显微结构 ,同时显微结构、游离硅含量影响材料力学性能 ,渗硅碳化硅 (PCRBSC)材料中随游离硅含量的增加 ,其抗折强度下降 ,并且二者呈直线关系 ,符合线性复合规则 :P =∑ni=1PiVi。

Through adjusting green body’s structure,the micro-structure and mechanics properties of PCRBSC is studied in this paper.The testing result shows the structure of green body affects the micror-structure of sintering body,the bending strength of PCRBSC will be reduced along with increasing content of free Si.