摘要
以炭毡为预制体,N2为稀释气体,在沉积温度为1100℃和1150℃时,研究不同气体前驱体(甲烷和丙烯)对微波热解CVI工艺(MCVI)制备炭/炭复合材料致密化速率和密度均匀性的影响,并观察材料的表面形貌和微观结构,分析MCVI工艺的可行性.结果表明,非极性甲烷更适用于MCVI工艺,预制体可实现从内到外逐步致密,避免了表面结壳现象,提高了致密化速率.采用该工艺,可在30h内制备密度达1.70g/cm3以上的炭/炭复合材料.
With felts of carbon fiber as preform and N2 as diluent gas,the densification rules of MCVI were studied by densification rate and radial-direction density distribution with different carbon source gas(methane and propylene)at deposition temperature of 1 100℃ and 1 150℃.The textures of sample were observed,the feasibility of MCVI was analyzed.Results show that CH4 is more suitable for the source gas of carbon/carbon composites prepared by MCVI than thesource gas C3H6.Pore choking at the surface of preform i...
出处
《深圳大学学报（理工版）》
EI
CAS
北大核心
2009年第1期77-80,共4页
Journal of Shenzhen University(Science and Engineering)
基金
国家自然科学基金资助项目(50672059)
广东科技攻关计划资助项目(2004B10301006)
深圳大学科研启动基金资助项目(200804)
关键词
炭/炭复合材料
微波
热解
CVI
致密化
carbon/carbon composites
microwave
pyrolysis
CVI
densification
