新型隔热炭／炭复合材料的制备工艺.pdfVIP

学兔兔 第l4卷第3期 粉末冶金材料科学与工程 2009年6月 、，01．14 NO．3 Materials Science and Engineering of Powder Metallurgy Jun．2009 新型隔热炭／炭复合材料的制备工艺 郭 俊，张明瑜，苏哲安，黄启忠，肖 勇 (中南大学 粉末冶金国家重点实验室，长沙 410083) 摘 要：针对国内对高性能隔热材料的广泛需求，以炭纤维毡为预制体、热固性树脂为先驱体，采用浸渍一固化 一 炭化的方法制备新型低密度隔热炭／炭复合材料。研究浸渍液的浓度、树脂和毡体的类型、层问粘接剂的浓度和 类型、固化时所加的外部压力等因素对材料密度的影响，并借助扫锚电镜观察、分析样品的微观结构。实验结果 表明，采用长纤维毡作预制体、呋喃树脂作先驱体，浸渍液浓度为 8％，层问粘接剂选用环氧树脂，固化压力为 1 200 MPa时，炭／炭复合材料的密度为0．17 g／cm ，热导率为0．19 W／(m·K)。 关键词：隔热材料；炭／炭复合材料；低密度；影响因素 中图分类号：TB 332 文献标识码：A 文章编号：1673．0224(2009)3—200—05 Process of preparing new type of heat insulation carbon／ carbon composite GUO Jun，ZHANG Ming—yu，SU Zhe—an，HUANG Qi—zhong，XIAO Yong (State Key Laboratory ofPowder Metallurgy,Central South University,Changsha 410083，China) Abstract：With carbon fiber felt as preform and thermosetting resin as precursor,impregnation-curing——carbonization process is employed to prepare a new type of low density heat insulation carbon／carbon composite，and the influence factors of the density including solution concentration，type of resin and felt，type and concentration of agglutinant as well as curing pressure are studied，the optimal condition of each factor is fixed．Through studying SEM photographs of samples after carbonization，causes of micro—defects are discussed．The results show that when long carbon fiber felt is preform，furan resin is precursor,solution concentration is 8％，agglutinant type is epoxy resin，curing pressure is 1 200 MPa，density of sample is 0．1 7 g／cm ，thermal conductivity of sample is 0．1 9 W／(m‘K)．