热障涂层(TBCs)高温氧化及熔盐腐蚀性能的研究  

HIGH TEMPERATURE OXIDATION AND MOLTEN SALT CORROSION OF TBCs

作　　者：王伊卿[1,2] 方其先[1,2] 韩志海[1,2] 陈德森[1,2] 

机构地区：[1]西安交通大学材料学院 [2]第一拖拉机工程机械公司

出　　处：《腐蚀科学与防护技术》1998年第1期6-10,共5页Corrosion Science and Protection Technology

摘　　要：对ＺｒＯ２－８ｗｔ％Ｙ２Ｏ３（ＹＳＺ）不同结构的热障涂层（ＴＢＣｓ）在１０５０℃、９００℃进行氧化及腐蚀试验．结果表明，结合层中加入ＹＳＺ，增大了Ｎｉ１６Ｃｒ８Ａｌ颗粒的表面积，氧化速率增加；结合层的氧化是ＴＢＣｓ性能下降的主要原因；在含硫的腐蚀环境下，面层中稳定组元Ｙ２Ｏ３的分解析出，破坏了ＹＳＺ的稳定性，改变了面层的应力状态，导致ＴＢＣｓ早期破坏．Oxidation and hot corrosion of different TBCs at separately 1050℃ and 900℃ were studied. Results of experiments show that the addition of YSZ in the middle layer can increase the surface area of Ni16Cr8Al particles, therefore decreases the oxidation resistance of TBCs. The oxidation of bond coating is the dominat mechanism of TBCs degradation. In a hot corrosion environment the decomposition and precipition of stable component Y 2O 3 in the YSZ makes YSZ unstable and changes the YSZ stress state, leading to the TBCs premature failure of TBCs.

关 键 词：熔盐腐蚀 热障涂层 高温氧化 等离子喷涂 

分 类 号：TG174.442[金属学及工艺—金属表面处理]