等离子喷涂热障涂层残余应力的实验与模拟研究(英文)  

Experimental and Numerical Investigation of Residual Stresses in Plasma-sprayed Thermal Barrier Coatings

作　　者：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] 

机构地区：[1]中国科学院特种无机涂层重点实验室,上海201899 [2]中国科学院上海硅酸盐研究所,上海201899 [3]中国科学院大学,北京100049 [4]青岛科技大学,青岛266042

出　　处：《无机材料学报》2013年第12期1381-1386,共6页Journal of Inorganic Materials

基　　金：National Natural Science Foundation of China(51202277)

摘　　要：分别采用真空和大气等离子体喷涂工艺在GH3128镍基高温合金基材表面制备CoNiCrAlY结合层和氧化钇部分稳定的氧化锆陶瓷层组成热障涂层。采用有限元模拟计算了涂层的残余应力,研究了基材预热对打底层与陶瓷层界面应力分布的影响规律。结果表明,预热基材可以显著地降低陶瓷顶层内部产生的残余拉应力。采用钻孔法测量了涂层中的残余应力并与模拟结果作定量比较,结果表明:有限元模拟计算结果与实验测量结果能较好吻合。Finite element analysis （FEA） was performed to analyze residual stresses development within thermal bar- tier coatings system consisting vacuum plasma sprayed CoNiCrA1Y bondcoat and atmospheric plasma sprayed yttria partially stabilized zirconia topcoat on the GH3128 nickel-based superalloy substrates. The effect of substrate preheat- ing process on the residual stress generated at the bondcoat/topcoat interface was evaluated. The results show that sub- strate preheating process reduces tensile stresses within the coating. To provide quantitatively comparison to the com- putational results, hole-drilling method was used to evaluate the residual stresses. The measured residual stresses are in agreement with the numerical simulation results obtained from FEA.

关 键 词：热障涂层 等离子喷涂 残余应力 有限元分析 

分 类 号：TQ174[化学工程—陶瓷工业]