PS-PVD双陶瓷层热障涂层热循环性能研究  

Study on Thermal Cycling Performance of PS-PVD Double Ceramic Barrier coating

作　　者：李信瑜 李建超 张雨生 李新慧 由晓明[1,2,3] 何箐 LI Xinyu;LI Jianchao;ZHANG Yusheng;LI Xinhui;YOU Xiaoming;HE Qing(Functional Coating and Equipment Technology Institute,Chinese Academy of Agricultural Mechanization Sciences Group Co.,Ltd.,Beijing 100083,China;Beijing Jinlunkuntian Special Machine Co.,Ltd.,Beijing 100083,China;Engineering Research Center for High-temperature Protective Coating Technology and Equipment of Machinery Industry,Beijing 100083,China)

机构地区：[1]中国农业机械化科学研究院集团有限公司功能涂层及装备技术研究所,北京100083 [2]北京金轮坤天特种机械有限公司,北京100083 [3]机械工业高温防护涂层技术及装备工程研究中心,北京100083

出　　处：《热喷涂技术》2025年第1期119-129,共11页Thermal Spray Technology

摘　　要：下一代超高温热障涂层多以双陶瓷层结构存在,针对具有优良热力学性能、低热导率和高温相稳定的锆酸钆涂层材料,采用等离子物理气相沉积工艺制备了YSZ单陶瓷层和YSZ/(Gd_(0.9)Yb_(0.1))_(2)Zr_(2)O_(7)(YSZ/GYbZ)双陶瓷层热障涂层,对涂层1 100℃热循环条件下的寿命和失效模式进行了分析。结果表明,YSZ/GYbZ和YSZ准柱状结构涂层热循环2 650次和950次后失效,TGO生长以及热膨胀不匹配引发的应力使TGO内部和TGO与陶瓷层之间产生裂纹,导致涂层失效;烧结退化导致柱状结构涂层收缩及层间断裂是另外一种典型失效形式。The next generation of ultra-high temperature thermal barrier coatings are mainly composed of double ceramic layers.For gadolinium zirconate coating materials with excellent thermodynamic properties,low thermal conductivity and stable high temperature phase,YSZ single ceramic layer and YSZ/(Gd_(0.9)Yb_(0.1))_(2)Zr_(2)O_(7)(YSZ/GYbZ)double ceramic thermal barrier coatings were prepared by plasma physical vapor deposition.The thermal cycle life and failure mode of the coating at 1100℃were analyzed.The results show that the YSZ/GYbZ and YSZ cylindrical coatings fail after 2650 and 950 cycles of thermal cycling.The stress caused by the mismatch of TGO growth and thermal expansion causes cracks in TGO and between TGO and ceramic layer,leading to coating failure.The shrinkage and interlayer fracture caused by sintering degradation is another typical failure mode.

关 键 词：热障涂层 等离子喷涂-物理气相沉积 锆酸钆 热循环 

分 类 号：TG174.4[金属学及工艺—金属表面处理]