基于不同基体条件的Sm_2Zr_2O_7/YSZ双层热障涂层界面残余热应力的数值仿真  

Numerical Simulation of Residual Thermal Stresses at the Interface of Sm_2Zr_2O_7/YSZ Double-layer Thermal Barrier Coatings Based on Different Matrix Conditions

作　　者：李振军[1] 吴惠云[2] 

机构地区：[1]河南工程学院机械工程系,河南郑州450007 [2]河南工程学院电气信息工程系,河南郑州450007

出　　处：《陶瓷学报》2012年第3期304-309,共6页Journal of Ceramics

摘　　要：采用有限元分析软件ANSYS对2Cr13基体等离子喷涂Sm2Zr2O7/YSZ双层热障涂层界面残余热应力分布进行了仿真。结果表明:在涂层Sm2Zr2O7/YSZ及YSZ/NiCoCrAlY界面存在较大的残余热应力,且应力梯度基本不变,表明应力梯度与基体厚度、半径无关。The distribution of residual thermal stresses at the interface of plasma sprayed Sm2Zr2O7/YSZdouble-layer thermal barrier coatings on 2Cr13 substrates were simulated by using ANSYS software. Results show that higher residual thermal stresses exist in theSm2Zr2O7/YSZ layer interface and the YSZE NJCoCrAIY layer interface, and the stress gradient is basically unchanged. It is also indicated that the stress gradient is independent of Matrix thickness and radius.

关 键 词：双层热障涂层 有限元数值仿真 涂层界面 残余热应力 应力梯度 

分 类 号：TQ174.75[化学工程—陶瓷工业]