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. 1 Partial-section view of finite element mesh for TBC system Material properties data used in the FEA were summarized in Table 1. To calculate the stress generated in the spraying process, the topcoat was considered as a hot block at the melting temperature of 2680℃ and tied to the underlying materials substrate+bondcoat at a given uniform preheating temperature. The latter was successively considered to be 25℃, 227℃ or 427℃ to study the effect of initial preheating temperature of the substrate. The topcoat elements were assumed to be in a solid phase at melting temperature, implying that contraction of the elements when they were in liquid phase did not generate significant stresses.