反应熔渗制备C/SiC复合材料的微观组织与性能  

Microstructure and Properties of C/SiC Composites Prepared by Reactive Melt Infiltration

作　　者：王鹏 于艺 金鑫[1] 于新民[1] 刘俊鹏[1] 张宝鹏 Wang Peng;Yu Yi;Jin Xin;Yu Xinmin;Liu Junpeng;Zhang Baopeng(Research Institute of Aerospace Special Materials and Processing Technology,Beijing 100074,China)

机构地区：[1]航天特种材料及工艺技术研究所,北京100074

出　　处：《稀有金属材料与工程》2020年第10期3382-3387,共6页Rare Metal Materials and Engineering

摘　　要：采用反应熔渗法将熔融Si渗入C/C多孔体中制备了C/SiC复合材料。研究了包埋式布硅对C/C多孔体不同位置毛细吸附行为的影响以及对制备C/SiC复合材料密度的影响。反应熔渗制备的C/SiC复合材料内部存在残余的游离硅,经过除硅处理后游离硅显著减少,但其致密化程度有所降低,同时其抗弯曲强度明显下降。C/SiC composites were prepared by reactive melt infiltration(RMI)of molten Si into the C/C porous preform.Influences of C/C porous preform embedded in silicon powder at different positions on the capillary absorption behaviors were investigated.Lots of free Si can be found inside of C/SiC composites prepared by RMI.The free Si decreases significantly in amount after desilication treatment of C/SiC composite,the densification degree and flexural strength decrease as well.

关 键 词：反应熔渗 C/SIC复合材料 游离硅 

分 类 号：TB332[一般工业技术—材料科学与工程]