C/C复合材料显微结构的微米、纳米尺度研究  

Micro- and nano-structural investigations of C/C composites

作　　者：梁加淼[1] 周庚衡[1] 贺连龙[1] 

机构地区：[1]中国科学院金属研究所沈阳材料科学国家联合实验室,辽宁沈阳110016

出　　处：《新型炭材料》2008年第1期69-74,共6页New Carbon Materials

基　　金：国家973项目(2006CB600905)~~

摘　　要：利用扫描电子显微镜、高分辨透射电子显微镜以及拉曼光谱对化学气相渗透C/C复合材料的形貌特征、显微结构以及石墨化度进行了系统表征。结果表明,热解炭是由厚度在几十到几百纳米的片层结构组成,这些片层结构围绕炭纤维呈层状排列;热解炭为粗糙层结构,在离子束的轰击下很容易撕裂和扭折。炭纤维/热解炭界面上存在一个宽度大约为15nm的无序区,该区域的形成可能与热解炭的沉积工艺有关。炭纤维和热解炭的石墨化度均很低,热解炭的R(R=ID/IG+D’)值由内层到外层逐渐降低。The morphology, microstructure and graphitization degree of C/C composites fabricated by chemical vapor infiltration were studied by SEM, HRTEM, selected area electron diffraction and laser Raman spectroscopy. The pyrolytic carbons were rough laminar with a thickness from several 10 nm to several 100 nm, and were aligned parallel to the fiber axis and easily split and twinned by ion beam irradiation. A disordered zone with a thickness of about 15 nm was also identified between the carbon fibers and the pyrolytic carbons, the formation of which may be dependent on the infiltration process. Both the carbon fibers and pyrolytic carbon had a low degree of graphitization and R （R = ID/IG＋D＇ ） decreased from the inner to the outer layers of the pyrolytic carbons.

关 键 词：C/C复合材料 显微结构 界面结构 热解炭 透射电子显微镜 

分 类 号：TB332[一般工业技术—材料科学与工程]