等离子喷涂热障涂层失效机理的研究  

Study of failure mechanisms of thermal barrier coatings by plasma spraying

作　　者：陈和兴[1] 金展鹏[1] 周克崧[2] 

机构地区：[1]中南大学材料科学与工程系,湖南长沙410083 [2]广州有色金属研究院,广东广州510651

出　　处：《广东有色金属学报》2002年第2期116-119,共4页Journal of Guangdong Non-Ferrous Metals

摘　　要：对等离子喷涂热障涂层热震失效和高温氧化失效机理进行了研究.结果表明,热障涂层具 有良好的抗热震性;ZrO2与基体间热膨胀系数的差异所产生的热应力是热震失效的主要原因;在 NiCrAlY与ZrO2的界面生成氧化物是高温氧化失效的主要原因.The mechanisms of thermal shock and high temperature oxidation for TBCs by plasma spraying have been studied. The results show that the TBCs possesses the well thermal shok resistance and the main cause of the thermal shock failure is the thermal stress caused by the thermal expansion coefficient difference between the ZrO2 coating and the substrate , the main cause of the high temperature oxidation failure is the oxide forming on the interface NiCrAlY and ZrO2.

关 键 词：等离子喷涂 热障涂层 失效机理 热震 高温氧化试验 

分 类 号：TG174.442[金属学及工艺—金属表面处理]