双层YSZ/La_2(Zr_(0.7)Ce_(0.3))_2O_7热障涂层高温性能研究  

High Temperature Performance of a Double-layered YSZ/La_2(Zr_(0.7)Ce_(0.3))_2O_7 Thermal Barrier Coating

作　　者：王梦雨[1,2] 吴琼[1,2] 冀晓鹃[1,2] 彭浩然[1,2] 

机构地区：[1]北京矿冶研究总院,北京100160 [2]北京市工业部件表面强化与修复工程技术研究中心,北京102206

出　　处：《热喷涂技术》2015年第3期30-35,共6页Thermal Spray Technology

基　　金：国家863项目资助(2012AA03A512)

摘　　要：采用等离子喷涂制备了双层YSZ/铈锆酸镧(La2(Zr0.7Ce0.3)2O7,LZ7C3)涂层,采用扫描电子显微镜(SEM)、X射线衍射分析(XRD)等研究了涂层的结合强度、高温抗热震性能、抗钙镁铝硅酸盐玻璃(CMAS)侵蚀性能等。结果表明:沉积态涂层呈现萤石结构;涂层与基体的最高结合强度达到了38Mpa以上;双层涂层在1200℃的热震次数达到33次;涂层失效方式主要为外层铈锆酸镧涂层发生了逐层剥离;LZ7C3可与CMAS形成高熔点的结晶物,抵抗CMAS的入侵。双层YSZ/铈锆酸镧涂层具有良好的抗热震和抗CMAS性能。A double layered YSZ/La2（Zr0.7Ce0.3）2O7（LZ7C3） thermal barrier coating was prepared by a plasmaspraying method. Its bond strength, thermal shock resistance at high temperature and calcium-magnesiumaluminum-silicate glass （CMAS） corrosion resistance were studied using scanning electron microscopy （SEM）,X-ray diffraction analysis （XRD） and other methods. Experimental results show that the as-deposited coatingexhibits a fluorite structure with a bond strength higher than 38MPa. The thermal shock life of the doublelayered coating at 1200 ℃ were 33 cycles, which mainly failed in a mode of layer by layer peeling of the outerLa2（Zr0.7Ce0.3）2O7 coating. The LZ7C3 can react with CMAS to form a solid crystalline phase with high meltingpoint, thereby resisting the CMAS invasion. In conclusion, the double layered YSZ/LZ7C3 thermal barrier coatinghas good thermal shock and CMAS corrosion resistances.

关 键 词：La2(Zr0.7Ce0.3)2O7 YSZ 热障涂层 等离子喷涂 热震 抗CMAS 

分 类 号：TG174.4[金属学及工艺—金属表面处理]