坯体密度对C/C-SiC复合材料烧蚀性能的影响  

Effects of Porous C/C Density on the Ablation Property of C/C-Si C composites

作　　者：安娜[1] AN Na(Xi'an Aeronautical Polytechnic Institute, Xi'an 710089,Shaanxi,China)

机构地区：[1]西安航空职业技术学院,陕西西安710089

出　　处：《中国铸造装备与技术》2017年第4期28-31,共4页China Foundry Machinery & Technology

摘　　要：以纳米SiC粉为惰性填料,采用先驱体浸渍裂解法制备C/C-SiC复合材料,研究了不同密度C/C坯体对复合材料烧蚀性能的影响。结果表明,不同密度C/C坯体对制得的复合材料性能有很大的影响,其中C/C预制体密度为1.24g/cm^3试样制得的复合材料性能最优,其最终密度为1.80g/cm^3,开孔率为7.32%,线烧蚀率和质量烧蚀率分别为0.0040mm/s和0.0012g/s。The C/C-SiC composites were fabricated via pre-cursor infi ltration pyrolysis(PIP)process with nano-SiC powder as fi ller.Porous carbon/carbon(C/C)composites with density of1.06,1.24and1.43g/cm3were used as preforms,and the effects of porous C/C density on the ablation properties of C/C-SiC composites were investigated.The results show that the densities of C/C preforms were important to C/C-SiC composites property.The density,porosity and linear and mass ablation rates of the composites derived from the preform with the density of1.24g/cm3,were1.80g/cm3,7.32%,0.0040mm/s and0.0012g/s,respectively.

关 键 词：先驱体浸渍裂解 惰性填料 烧蚀性能 C/C-SIC 

分 类 号：TB332[一般工业技术—材料科学与工程]