镍催化制备炭/炭复合材料研究  

Study on Ni-catalytic Preparation of Carbon/Carbon Composites

作　　者：周振中[1] 李铁虎[1] 李彩霞[2] 宋发举[1] 

机构地区：[1]西北工业大学材料学院,西安710072 [2]西安武警工程学院电子技术系,西安710086

出　　处：《材料导报》2007年第9期132-134,145,共4页Materials Reports

基　　金：国家自然科学基金资助项目(50472081)

摘　　要：采用催化化学气相渗透法(CCVI)制备出炭/炭(C/C)复合材料。考察了Ni/SiO2、Ni/Al2O3、Ni/ZSM-5负载型催化剂对热解炭沉积速率和微观结构的影响,并借助偏光显微镜(PLM)、扫描电子显微镜(SEM)和X射线衍射分析(XRD)表征了热解炭的微观结构。结果表明:在添加催化剂的碳纤维预制体中,热解炭有较快的沉积速率和较好的微观结构。其微观结构和沉积机理均与催化剂有关。To research the microstructure of pyrocarbon and the mechanism of catalytic depositing carbon/carbon（C/C） composites are fabricated with catalytic chemical vapor infiltration. In this paper, the influences of Ni/SiO2, Ni/Al2O3 and Ni/ZSM-5 supported catalysts on the depositing carbon rate and microstructure are investigated in details. Polarized light microscopy （PLM）, scanning electronic microscopy （SEM） and X-ray diffraction（XRD） analysis are used to characterize the texture of pyrocarbon in pure C/C composites （as contrast） and C/C composites added with Ni/SiO2, Ni/Al2O3 and Ni/ZSM-5 powders （200 mesh）, respectively. The result shows that pyrocarbon has faster depositing rate and higher-texture in carbon fiber cloth suhstrates doped with supported catalysts than that of the pure ones. Both the microstucture of the pyrocarbon and its deposition mechanism have a close correlation with the catalysts.

关 键 词：镍 C/C复合材料 催化化学气相渗透 微观结构 沉积机理 

分 类 号：TB332[一般工业技术—材料科学与工程]