文献类型：期刊文献

英文题名：Novel-structured plasma-sprayed thermal barrier coatings with low thermal conductivity, high sintering resistance and high durability

作者：Huang, Ji Bo[1];Wang, Wei Ze[1];Li, Yuan Jun[1];Fang, Huan Jie[1];Ye, Dong Dong[1];Zhang, Xian Cheng[1];Tu, Shan Tung[1]

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

年份：2021

卷号：47

期号：4

起止页码：5156

外文期刊名：CERAMICS INTERNATIONAL

收录：;EI(收录号：20204309379018);WOS:【SCI-EXPANDED(收录号:WOS:000608677100001)】；

基金：This research was supported by the National Natural Science Foundation of China (NSFC) under grant No. 51775189 and by the Shanghai Pujiang Program (15PJD009).

语种：英文

外文关键词：Thermal barrier coating; Plasma spraying; Microstructure; Thermal conductivity; Sintering; Durability

摘要：The microstructure of the ceramic topcoat has a great influence on the service performance of thermal barrier coatings (TBCs). In this study, conventional layered-structure TBCs, nanostructured TBCs, and novel-structured TBCs with a unique microstructure were fabricated by air plasma spraying. The relationship between the microstructure and properties of the three different TBCs was analysed. Their thermal insulation ability, sintering resistance, and durability were systematically evaluated. Additionally, their failure modes after being subjected to two kinds of thermal shock tests were analysed. The results revealed that the novel-structured TBCs had remarkably superior performances in all the examined aspects. The thermal conductivity of the novel-structured TBCs was significantly lower than those of the conventional and nanostructured TBCs both in the as-sprayed state and after thermal treatment for 500 h at 1100 degrees C. The macroscopic elastic modulus of the novel-structured TBCs after sintering at 1300 degrees C for 100 h was similar to those of the conventional and nanostructured TBCs in the as-sprayed state. During both a burner rig thermal shock test and a furnace cyclic oxidation test, the thermal shock lifetime of the novel-structured TBCs was much longer than those of the conventional and nanostructured TBCs. This study has demonstrated novel-structured plasma-sprayed TBCs with high thermal insulation ability and high durability.