化学液相气化沉积制备的炭/炭复合材料组织均匀性研究  

Study on microstructure uniformity of carbon/carbon composites prepared by chemical liquid-vaporized infiltration

作　　者：李新涛[1] 李克智[1] 李贺军[1] 王鹏云[1] 和永岗[1] 

机构地区：[1]西北工业大学炭/炭复合材料工程技术研究中心,西安710072

出　　处：《固体火箭技术》2007年第5期437-441,共5页Journal of Solid Rocket Technology

基　　金：国家"973"资助项目(2006CB600908)

摘　　要：采用化学液相气化沉积快速致密化工艺制备了C/C复合材料,分析了发热体尺寸和放置方式对材料组织均匀性的影响。通过排水法测量了材料轴向密度和孔隙率分布,采用偏光显微镜观察了材料的组织均匀性。结果表明,发热体尺寸越大,材料的组织均匀性增加,孔隙率降低,并能够缩短沉积时间;沉积过程中预制体内的温度分布是决定材料组织均匀性的主要因素。Carbon/carbon （C/C） composites were prepared by chemical liquid-vaporized infiltration （CLVI） method. The influences of size and position of graphite heater on microstructure uniformity of C/C composites were briefly analyzed. Density and porosity of C/C composites along axial direction were measured by penetration technique, and microstructure uniformity of the composites was observed by polarized light microscopy （PLM）. The results show that microstructure uniformity is increased, porosity is decreased, and deposition time is reduced with the increase of graphite heater size. The temperature distribution inside the preforms plays an important role in microstructure uniformity of C/C composites.

关 键 词：C/C复合材料 化学液相气化沉积 组织均匀性 

分 类 号：TB33[一般工业技术—材料科学与工程]