文献类型：期刊文献

英文题名：Effect of Particle Size on the Thermal Shock Resistance of Plasma-Sprayed YSZ Coatings

作者：Huang, Jibo[1];Wang, Weize[1];Lu, Xiang[1];Hu, Doudou[1];Feng, Zhengqu[1];Guo, Tianxu[2]

机构：[1]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[2]Shanghai Junshan Surface Technol Engn Co Ltd, Shanghai 201900, Peoples R China

年份：2017

卷号：7

期号：9

外文期刊名：COATINGS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000411706300018)】；

基金：The authors gratefully appreciate the support of National Natural Science Foundation of China (No. 51775189), Science and Technology Commission of Shanghai Municipality Project (16DZ2260604), Aviation funding (2015ZES7001) and Shanghai Pujiang Program (15PJD009).

语种：英文

外文关键词：thermal barrier coatings; YSZ; particle size; pore; thermal shocks; stress

摘要：In this study, yttria-stabilized zirconia (YSZ) coatings were deposited by atmospheric plasma spraying (APS) using feedstocks with two different particle sizes. The effect of particle size on the pore structure and failure mechanism of the coatings was investigated. The evolution of the pore structure of the two kinds of coatings during cyclic thermal shock test was described by quantitative metallography. The influence of pore orientation on the thermal stress of the coating system was analyzed by the finite element method. It was found that the coatings deposited using coarse particles show a high thermal shock life time. The orientation of the pores in the coatings prepared by different particle sizes was different. A structural parameter was proposed to effectively characterize the pore orientation of the coatings. Coatings prepared by coarse YSZ powder tend to form almost the same number of horizontal and vertical pores, while coatings prepared by fine powder tend to form horizontal ones parallel to the direction of the substrate. The simulation results revealed that the vertical pores can reduce the thermal stress in the coating. The results of this investigation are a benefit to the design and integrity of TBCs.