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.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
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)
关键词
C/C复合材料
化学液相气化沉积
组织均匀性
carbon/carbon composite
chemical liquid-vaporized infiltration
microstructure uniformity
