炭源对制备炭/炭复合材料微波CVI工艺的影响  

Influence carbon sources on the densification of carbon/carbon composites preparation in microwave pyrolysis CVI

作　　者：邹继兆[1] 曾燮榕[1] 黎晓华[1] 熊信柏[1] 谢盛辉[1] 钱海霞[1] 

机构地区：[1]深圳大学材料学院深圳市特种功能材料重点实验室,深圳518060

出　　处：《深圳大学学报（理工版）》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)

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...

关 键 词：炭/炭复合材料 微波 热解 CVI 致密化 

分 类 号：TB332[一般工业技术—材料科学与工程]