2D C/C复合材料微观结构与力学性能的研究  

Study on the Microstructures and Mechanical Properties of 2D C/C Composites

作　　者：和永岗[1] 李克智[1] 魏建锋[1] 郭领军[1] 张磊磊[1] 

机构地区：[1]西北工业大学炭/炭复合材料研究中心,西安710072

出　　处：《无机材料学报》2010年第2期173-176,共4页Journal of Inorganic Materials

基　　金：国家"973"项目(2006CB600908);国家"111"引智计划(B08040)

摘　　要：采用等温化学气相渗透方法,通过调整沉积工艺,制备了具有不同微观组织结构的2D C/C复合材料.利用偏光显微镜(PLM)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)结合选区电子衍射(SAED),研究了热解炭基体微观组织结构,借助万能试验机测试了材料的三点弯曲性能.结果表明:层状高织构(HT)热解炭基体占优时C/C复合材料表现为假塑性断裂;扁平片状中织构(MT)热解炭与颗粒状各向同性层热解炭(ISO)有利于提高材料的弯曲强度;HT基体与炭纤维界面结合良好,界面处不存在非HT织构,但取向角(OA)略有增大.The 2D C/C composites with different microstructures were fabricated by isothermal-isobaric chemical vapor infiltration（ICVI）.The mechanical properties of the 2D C/C composites were investigated by 3-point bending tests.The microstructures of the pyrocarbon matrix were observed by polarized light microscope（PLM）,scanning electron microscope（SEM）,transmission electron microscope（TEM） combining selected area electron diffraction（SAED）.The results show that 2D C/C composites with dominant layered-HT pyrocarbon matrix exhibit a pseudo-plastic failure behavior.The flake-like fragments MT and granular-like particles ISO are in favor of increasing the flexural strength of the materials.It exists a good interfacial bonding between the fiber and HT layer.The non-HT layer does not exist at the interface,but the orientation angle（OA） of the matrix slightly increases.

关 键 词：C/C复合材料 组织结构 弯曲强度 取向角 

分 类 号：TB332[一般工业技术—材料科学与工程]