文献类型：期刊文献

英文题名：Improve durability of plasma-splayed thermal barrier coatings by decreasing sintering-induced stiffening in ceramic coatings

作者：Huang, JiBo[1];Wang, WeiZe[1];Li, YuanJun[1];Fang, HuanJie[1];Ye, DongDong[1];Zhang, XianCheng[1];Tu, ShanTung[1]

机构：[1]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China

年份：2020

卷号：40

期号：4

起止页码：1433

外文期刊名：JOURNAL OF THE EUROPEAN CERAMIC SOCIETY

收录：;EI(收录号：20195007830135);WOS:【SCI-EXPANDED(收录号:WOS:000514747500063)】；

基金：The authors gratefully appreciate the support of National Natural Science Foundation of China (No. 51775189) and Shanghai Pujiang Program (15PJD009).

语种：英文

外文关键词：PS TBCs; Microstructure; Sintering; Thermal shock; Failure mechanism

摘要：In this study, a newly-tailored plasma-sprayed (PS) yttria-stabilized zirconia (YSZ) ceramic coating towards enhanced strain tolerance and sintering resistance was developed to improve the durability of TBCs. The thermal shock life was found to be markedly prolonged by more than four times. Failure mechanisms and sintering behavior of the newly-structured and conventional TBCs were systematically investigated through microstructural and mechanical analyses. Conventional TBCs suffered a premature spallation due to rapid sintering-induced stiffening of the ceramic top coat. In contrast, the new coating exhibits an enhanced sintering resistance whereby preserving a good strain tolerance over time. Specifically, its elastic modulus after thermal exposure remains comparable to the as-sprayed states. The effect of ceramic top coat stiffness on cracking behavior of TBCs was clarified by a corresponding cohesive zone finite element modeling. This study provides a new option for improving TBCs durability and the results could benefit the increased integrity of TBCs.