SiC/SiC复合材料的制备及力学性能研究  

PREPARATION AND MECHANICAL PROPERTY OF SIC/SIC COMPOSITE

作　　者：赵锴[1] 于新民[1] 罗发[1] 朱冬梅[1] 周万城[1] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《陕西科技大学学报（自然科学版）》2007年第3期39-42,共4页Journal of Shaanxi University of Science & Technology

基　　金：国家自然科学基金项目(50572090)

摘　　要：采用低压化学气相渗透(LPCVI)工艺制备了具有不同热解碳界面层厚度的SiC/SiC复合材料,对热解碳沉积工艺以及复合材料的力学性能进行了研究.结果表明:沉积温度、系统总压、PN2/PC3H6均会使沉积热解碳的形貌发生改变;随热解碳界面厚度增加,复合材料的韧性提高,弯曲强度先增大后减小.SiC/SiC composites with different pyrocarbon interface thickness were fabricated by LPCVI. The process of pyrocarbon deposition and mechanical property of the composites were studied. The results show that the pyrocarbon morphology was affected by the deposi- tion temperature, system pressure and the PN2/PcaH6 ratio;as the increasing of the interface thickness,the toughness of the composite increases,and the flexural strength decreases after a period of increasing.

关 键 词：SIC/SIC复合材料 界面 热解碳 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]