摘要
研究了廉价聚硅氧烷的交联与裂解情况 ,并以其为先驱体制备出Si O C陶瓷基复合材料。结果表明 ,在氯铂酸的催化下 ,聚硅氧烷与二乙烯基苯可以交联固化。当聚硅氧烷 二乙烯基苯摩尔比为 1∶0 5时 ,陶瓷产率达 6 0 5 2 %。经 6次浸渍 交联 裂解过程制备出碳纤维三维编织物增强陶瓷基复合材料 ,其密度达到1 5 9g cm3 ,弯曲强度达到 32 1MPa ,断裂韧性达到 9 38MPa·m1 2 。
In order to reduce the cost of ceramic matrix composites(CMC),we adopted polysiloxane(PSO),a rather cheaper agent,as the precursor.The study shows that it is feasible to prepare carbon fiber braided preform reinforced ceramic matrix composite using PSO/divinyl benzene(DVB).After six cycles of infiltration-curing-pyrolysis,the composite reached a density of 1^59g/cm+3,a flexural strength of 321MPa,and a fracture toughness of 9^38MPa5m 1/2.The amount of the catalyst is the most important factor to influence the crosslinking of PSO and DVB.
出处
《材料科学与工程》
CSCD
北大核心
2003年第1期13-16,共4页
Materials Science and Engineering
基金
"九五"国防预研资助项目
