莫来石涂层对碳化硅材料高温抗氧化性能的影响  

Effects of Mullite Coating on the Anti-oxidation of Silicon Carbide at High Temperature

作　　者：吕振林[1,2] 李世斌[3] 高积强[3] 金志浩[3] 李贺军[1] 

机构地区：[1]西北工业大学材料学院 [2]西安理工大学材料学院,陕西西安710048 [3]西安交通大学材料学院

出　　处：《稀有金属材料与工程》2003年第7期534-537,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(59772013);陕西省自然科学基金资助项目(2001C11)

摘　　要：采用溶胶-凝胶法在不同颗粒尺寸的再结晶碳化硅材料表面制备了莫来石涂层,研究了涂层和颗粒尺寸对再结晶碳化硅材料在1500℃时的高温氧化行为的影响。结果表明:莫来石涂层可显著提高再结晶碳化硅材料的高温抗氧化能力,且随涂层厚度增加,再结晶碳化硅材料的抗氧化能力提高;而且莫来石涂层和粗颗粒碳化硅粒子共同作用时效果更好。The effects of mullite coating by sol - gel method and the particle sizes of SiC on the oxidation behavior of the recrystallized SiC were studied. The results showed that the oxidation resistance could be increased by the mullite coating formed on the surface of recrystallized silicon carbide at high temperature and with the increase of the thickness of mullite coating, having well effects both by mullite coating and coarse particles of the recrystallized SiC.

关 键 词：碳化硅 莫来石涂层 高温氧化 

分 类 号：TG174.4[金属学及工艺—金属表面处理]