聚碳硅烷先驱体制备SiC基复合材料的性能研究  

Study on the Properties of Polycarbosilane Precurser SiC Matrix Composite

作　　者：陈朝辉[1] 张长瑞[1] 冯春祥[1] 张凌[2] 刘成民[1] 

机构地区：[1]国防科技大学材料科学与应用化学系 [2]材国防科技大学料科学与应用化学系

出　　处：《国防科技大学学报》1992年第4期111-115,共5页Journal of National University of Defense Technology

摘　　要：本文以聚碳硅烷(PCS)为先驱体,SiC晶须,SiC微粉或C纤维为增强剂,热解转化制得SiC/SiC或C/SiC复合材料,研究其制备工艺过程对材料的力学和热物理性能的影响。结果表明:PCS在1300℃下转化为β-SiC微晶并将未烧结的增强剂网络在一起形成SiC/SiC或C/SiC复合材料。该SiC基复合材料具有较好的常温和高温机械强度,优异的耐热疲劳和抗热震性能,在1300℃空气中具有良好的抗氧化性。By using polyearbosilane as precursor and SiC whisker, SiC powder or carbon fiber as reinforcer, the SiC/SiC or C/SiC composite was fabricated. The influences of the properties of mechanics and thermal physics were investigated. The results showed that at 1300℃ polyearbosilane was transformed into β—SiC mic—crystal which linked the reinforcer to form the SiC/SiC or C/SiC composite. The composite has good mechanical properties at both room temperature and high temperature, excellent thermal shock resistance and thermal fatigur resistance, and good oxidation resistance at 1300℃ in air.

关 键 词：复合材料 聚碳硅烷 碳化硅陶瓷 

分 类 号：TQ174.758[化学工程—陶瓷工业]