文献类型：期刊文献

英文题名：Control of the Pore Structure of Plasma-Sprayed Thermal Barrier Coatings through the Addition of Unmelted Porous YSZ Particles

作者：Li, Yuanjun[1];Huang, Jibo[1];Wang, Weize[1];Ye, Dongdong[1];Fang, Huanjie[1];Gao, Dong[2];Tu, Shantung[1];Guo, Xueping[3];Yu, Zexin[4]

机构：[1]East China Univ Sci & Technol, Minist Educ, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China;[2]AECC Commercial Aircraft Engine Co Ltd, Dept Wing Surface, Shanghai 200241, Peoples R China;[3]Jimei Univ, Marine Engn Coll, Xiamen 361023, Peoples R China;[4]Soochow Univ, Sch Mech & Elect Engn, Suzhou 215006, Peoples R China

年份：2021

卷号：11

期号：3

外文期刊名：COATINGS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000633557100001)】；

基金：This research were funded by National Natural Science Foundation of China, No. 51775189, Shanghai Space Science and Technology Innovation Fund, SAST 2019056 and Science and Technology Project of Fujian Province 2019H6017, FJHJF-L-2020-6.

语种：英文

外文关键词：thermal barrier coatings; pore structure; spraying parameters; sintering; mechanical properties; thermal cycle lifetime

摘要：In this study, a new pore structure control method for plasma-sprayed thermal barrier coatings (TBCs) through the addition of unmelted, porous yttria-stabilized zirconia (YSZ) particles was investigated. Through a unique way of feeding powder, two powder feeders were used simultaneously at different positions of the plasma flame to deposit a composite structure coating in which a conventional plasma-sprayed coating was used as a matrix and unmelted micro-agglomerated YSZ particles were dispersed in the dense conventional coating matrix as second-phase particles. The effects of the distribution and content of second-phase particles on the microstructure, mechanical properties, and lifetime were explored in a furnace cyclic test (24 h) of the composite coating. The mechanical properties and lifetime of the composite coating depend on the content and morphology of the particles embedded in the coating. The lifetime of the composite structure coatings is significantly higher than that of the conventional coatings. By adjusting the spraying parameters, the lifetime of the composite coating prepared under the optimum process is up to 145 days, which is about three times that of the conventional coating. The results of this study provide guidance for the preparation of high-performance composite structure TBCs.