先驱体浸渍裂解制备多孔C/SiC复合材料及渗透性研究  

Fabrication of porous C/SiC composite by PIP process and study on porosity

作　　者：吉洪亮[1] 张长瑞[1] 周新贵[1] 曹英斌[1] 

机构地区：[1]国防科技大学新型陶瓷纤维及复合材料国防科技重点实验室,长沙410073

出　　处：《粉末冶金材料科学与工程》2008年第1期45-49,共5页Materials Science and Engineering of Powder Metallurgy

基　　金：国家高技术研究发展计划(863计划)资助项目(2002AA724064)

摘　　要：以聚碳硅烷(PCS)为原料,采用先驱体浸渍裂解(PIP)工艺制备多孔C/SiC复合材料,并研究该材料的孔隙率、孔隙结构及渗透性能。结果表明,所制备的多孔C/SiC复合材料的孔隙主要由纤维束间的开孔组成。经过6次与7次PIP工艺致密化处理后的复合材料,开孔率分别为22.76%和20.51%,绝对渗透率分别为1.17×10-3和9.68×10-4mm2。水和煤油在该材料中具有良好的渗透性能,渗透表现为线性层流流动,表明多孔C/SiC复合材料在发汗冷却材料中具有很大的应用潜力。Porous C/SiC composites were fabricated by precursor infiltration and pyrolysis technology （PIP） and it porosity, pore structure and infiltrative property were studied. The results show that the pores of the composites ar mostly composed of open pore and the actual open porosity is close to the theoretic open porosity. The water infiltrativ rate of the composites prepaid by 6 and 7 PIP cycles is 1.17× 10^-3 mm^2, 9.68×10^-4 mm^2, respectively. The infiltrativ flow is linear laminar flow when water and kerosene are infiltrated through porous C/SiC composites indicating that th porous C/SiC composites has great application potentiality for using as transpiration cooling materials.

关 键 词：多孔C/SiC复合材料 孔隙率 孔隙结构 渗透性能 

分 类 号：TB332[一般工业技术—材料科学与工程]