C/SiC刹车材料硼硅玻璃防氧化涂层的结构与性能  

Microstructure and properties of borosilicate glass coating for oxidation protection of C/SiC brake materials

作　　者：药宁娜[1] 成来飞[1] 徐永东[1] 张立同[1] 范尚武[1] 

机构地区：[1]西北工业大学超高温结构复合材料国防科技重点实验室,西安710072

出　　处：《固体火箭技术》2007年第4期358-361,共4页Journal of Solid Rocket Technology

基　　金：陕西省自然基金(2004E116);教育部跨世纪人才培养计划基金(2002);长江学者和创新团队发展计划资助

摘　　要：采用溶胶-凝胶法制备了C/SiC刹车材料硼硅玻璃防氧化涂层。用FTIR、XRD、TG-DSC研究了溶胶到玻璃的形成过程,并分析了硼硅玻璃涂层的防氧化性能及抗热震性能。结果表明,所得硼硅玻璃涂层均匀、致密,并与基体结合紧密。在800℃,硼硅玻璃涂层具有优异的防氧化性能,良好的高温稳定性和抗热震性能,尤其具有优良的耐海水侵蚀性能。在800℃氧化10 h,未经海水浸泡的涂层样失重率约为0.33%;经过海水浸泡的涂层样失重率约为2.36%。经50次热震(共氧化10 h)后,涂层保持完好,失重率约为9.79%。The borosilicate glass coating for oxidation protection of C/SiC brake materials was prepared by sol-gel method. The formation process from sol to glass was investigated by FTIR, XRD and TG-DSC, and the capabilities of oxidation resistance and thermal shock resistance were analyzed. The results show that the borosilicate glass coating was uniform and dense, moreover it can be closely boned with the composite substrates. At 800 ℃, the horosi/icate glass coating has excellent capabilities of oxidation resistance and thermal shock resistance, high-temperature stability as well as superior sea water corrosion resistance. After the coating samples were oxidized for 10 h at 800℃ ,weight loss ratio of the samples with and without sea water immersion was about 2.36 % and 0.33 % respectively,After thermal shock for 50 times （10h） ,the coating remained undamaged,and the weight loss was about 9.79 %.

关 键 词：溶胶-凝胶法 硼硅玻璃 防氧化涂层 

分 类 号：TB332[一般工业技术—材料科学与工程]