液相浸渍法制备针刺C/C复合材料  

Needle-Punching C/C Composite Prepared by Liquid Impregnation

作　　者：夏鸿雁[1] 侯卫权[1] 张晓虎[1] 吴书峰[1] 

机构地区：[1]西安航天复合材料研究所,西安710025

出　　处：《宇航材料工艺》2008年第3期37-39,48,共4页Aerospace Materials & Technology

摘　　要：以T300无纬布与PAN碳纤维网胎叠层针刺预制体,高温煤沥青为浸渍剂,采用和高压浸渍炭化相结合的液相浸渍方式制备C/C复合材料。通过对材料力学、热物理性能测试及扫描电镜下显微结构的观察分析。可以得出,引入z向网胎纤维,使材料的z向剪切及压缩、x-y向拉伸及弯曲强度较整体毡C/C材料提高。同时,材料的线胀系数表现为各向异性,而热导率各向异性程度低于整体毡C/C材料,材料的制备周期缩短。After T-300 carbon fiber cloths and PAN carbon fiber web were needled,C/C composite was prepared by normal and high pressure impregnating carbonization with high temperature coal pitch.Mechanical and thermal physical properties were measured and structure was analyzed with metallographs. The results showed that needle-punching of web fiber along z direction evidently enhanced shear and compression strength in z direction, tensile and bend strength in x-y direction compared with integrated felt.Besides,therm...

关 键 词：叠层针刺预制体 液相浸渍 C/C复合材料 力学性能 热物理性能 

分 类 号：TB332[一般工业技术—材料科学与工程]