热震性能的影响
(1.中国科学院 金属研究所， 沈阳 110016;
2.沈阳工业学院 材料科学与工程分院，沈阳 110015;
3.北京航空制造技术研究所 高能束流加工技术重点实验室，
北京 100024)
摘 要: 采用等离子喷涂(PS)在GH536高温合金基材上制备了典型的双层热障涂层(TBCs)和两种分别加入了Al2O3陶瓷成分的复合热障涂层。典型的TBCs采用Ni22Cr10AlY连 接层 与8％Y2O3稳定的(8YPSZ)顶层的双层结构；多层涂层分别采用Al2O3与Ni22Cr10AlY复合的连接层和Al2O3与8YPSZ复合的顶层。3种类型试样的100h，1000℃静态氧化及1050℃热震试验的结果分析表明：8YPSZ+Al2O3的复合氧障层具有最佳的氧化阻力；Ni22Cr10AlY+8YPSZ双层涂层的热震阻力最佳，氧化阻力最差；连接层采用Ni22Cr10AlY+Al2O3复合涂层具有热震和静态氧化条件下综合优良的高温热循环性能。
关键字: 等离子喷涂；热障涂层；静态氧化；热震
plasma sprayed thermal barrier
coatings
（1.Institute of Metal Research， The Chinese Academy of
Sciences，Shenyang 110016，China;
2.School of Materials Science and Engineering，
Shenyang Institute of Technology，Shenyang 110015，China;
3.Key Laboratory for High Energy Density Beam Processing Technology，
Beijing Aeronautical Manufacturing Technology Research Institute，
Beijing 100024, China）
Abstract:Three types of plasma sprayed (PS) thermal barrier coatings (TBCs) on GH536 superalloy substrate with different layers of Ni22Cr10Al1Y，ZrO2+8%Y2O3(8YSZ)，and composite layer of 8YSZ+Al2O3 or Ni22Cr10Al1Y+Al2O3 were prepared. The static oxidation test and thermal shock test were conducted to evaluate t he oxidation kinetics and thermal shock cyclic lifetime of the TBCs. Under the different failure criterions，the failure mechanisms of TBCs were discussed. It is indicated that the higher oxidation resistance is obtained by using composite oxygen barrier layer. The thermal shock resistance of TBCs with Ni22Cr10Al1Y+Al2O3 composite layer is better than that with 8YSZ+Al2O3 composite layer.
Key words: thermal barrier coatings; plasma spraying; thermal shock; static oxidation
