热障涂层的破坏方式及影响因素  

The Damage Mode and Effective Factor of Thermal Barrier Coating Layers

作　　者：胡传顺[1] 王福会[2] 吴维[2] 

机构地区：[1]抚顺石油学院化工机械系,辽宁抚顺113001 [2]中国科学院金属腐蚀防护国家重点实验室,辽宁沈阳110015

出　　处：《石油化工高等学校学报》1999年第4期77-80,共4页Journal of Petrochemical Universities

摘　　要：为提高涡轮发动机前燃气进口温度或加力燃烧室温度而采用的热障涂层技术是近年来国际高温涂层领域最活跃的研究课题之一，并且在西方的一些先进发动机上采用了热障涂层技术。然而试验或使用结果表明，热障涂层过早剥落失效现象仍存在。热障涂层在高温下服役较长时间，其粘结层与基体将遇到高温氧化问题，使其成为热障涂层最典型的损伤模式。燃料中含Ｎａ 和Ｓ 等杂质，以Ｎａ２ＳＯ４形式沉积在高温部件上，造成热障涂层的热腐蚀。夹杂硬质颗粒的气流撞击涂层表面，可形成腐蚀。此外，外界大颗粒物体损伤热障涂层也是一个严重问题。研究热障涂层退化机制有利于指导热障涂层制备工艺，使热障涂层长期稳定使用。为此，综述了近年来有关热障涂层的退化方式及影响因素。Thermal barrier coating layers applied to gas turbine engine for increasing temperature of former fuel inlet and combustion chamber are one of the most active research projects in international high temperature coating field in recent years, and this technology has been used in some vestern advanced engine. However, experimental and service results show that there are spallation phenomena much earlier than expectation of time. Because TBCs are in service for a long time, oxidation problems of their bond coat and substrate are the most typical damage mode. There are Na and S foriegn substance in fuel , hot corrosion occurs because of Na 2SO 4 depositing on the high temperature components. Air jet consisting of hard particle collides with coating surface to result in erosion corrosion. It is another serious problem that outside large object makes TBCs fail. Therefore study on the damage mechanism of TBCs has benefit to guide the preparation processing of TBCs for long stable utilization. Thereafter the damage mode and effective factor of TBCs in recent years are summarized and the newest research achievements are reported.

关 键 词：热障涂层 破坏方式 涂层 发动机 涡轮发动机 

分 类 号：TG174.44[金属学及工艺—金属表面处理] TK406[金属学及工艺—金属学]