等离子喷涂热障涂层残余应力的实验与模拟研究
杨加胜1,2,3, 于建华4, 钟兴华1,2, 赵华玉1,2, 周霞明1,2, 陶顺衍1,2, 丁传贤1,2

Experimental and Numerical Investigation of Residual Stresses in Plasma-sprayed Thermal Barrier Coatings
YANG Jia-Sheng1,2,3, YU Jian-Hua4, ZHONG Xing-Hua1,2, ZHAO Hua-Yu1,2, ZHOU Xia-Ming1,2, TAO Shun-Yan1,2, DING Chuan-Xian1,2
Fig. 3 Radial quenching stress through the CoNiCrAlY and YSZ layers of the TBCs Figure 4 and Fig. 5 show the distributions of axial and shear stress along radius at the bondcoattopcoat interface calculated through FEA after TBC system cooled to room temperature. Modeling results show that there are remarkable stresses concentration at the edge of the interface. Near the longitudinal axial x =0 mm, the axial and shear stresses are zero at the bondcoattopcoat interface. Near the free edge, both axial and shear stresses state gradually change from compressive to tensile along the interface radius. The maximum value of tensile axial stress is found to be ~64 MPa within the topcoat near the free edge, as shown in Fig. 4.