LI Zhenjun 1, WU Huiyun 2
(1.Department of Mechanical Engineering, Henan Institute of Engineering, Zhengzhou Henan 450007, China; 2.Department of Electrical Information Engineering, Henan Institute of Engineering, Zhengzhou Henan 450007, China)
Abstract:The distribution of residual thermal stresses at the interface of plasma sprayed Sm2Zr2O7/YSZ double-layer thermal barrier coatings on 2Cr13 substrates were simulated by using ANSYS software. Results show that higher residual thermal stresses exist in the Sm2Zr2O7/YSZ layer interface and the YSZ/ NiCoCrAlY layer interface, and the stress gradient is basically unchanged. It is also indicated that the stress gradient is independent of Matrix thickness and radius.
Key words: double -layer thermal barrier coatings; finite element; numerical simulation; coating interface; residual thermal stress; stress gradient