文献类型：期刊文献

英文题名：Ablation behavior and delamination mechanism of air plasma sprayed (Gd Yb) doped YSZ double ceramic layer thermal barrier coatings at 1500 ° C

作者：Yang, Kehan[1];Shi, Junmiao[1];Liu, Liqiang[1];Chen, Xiaolong[2];Xu, Wenhu[1];Zhao, Zheng[1];Tian, Fuqiang[1];Zhang, Xiancheng[1]

机构：[1]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[2]Jinan Univ, Inst Adv Wear & Corros Resistant & Funct Mat, Guangzhou 510632, Peoples R China

年份：2025

卷号：496

外文期刊名：SURFACE & COATINGS TECHNOLOGY

收录：;EI(收录号：20245117558038);WOS:【SCI-EXPANDED(收录号:WOS:001393990800001)】；

语种：英文

外文关键词：Delamination; Ablation behavior; Thermal insulation; Thermal barrier coating

摘要：The aerospace industry has an urgent need for thermal insulation performance, especially for thermal barrier coatings (TBCs) on hot-end components, and (Gd,Yb) doped YSZ coatings are highly expected to be used as thermal insulating materials due to their low thermal conductivity. In this study, double-layer ceramic layer (DCL) TBCs with different layer thicknesses were prepared by atmospheric plasma spraying, and the characteristics of (Gd,Yb) doped YSZ (RYSZ, R is two rare-earth elements Gd and Yb, R = 6-9 wt%) were investigated by continuous thermal shock at 1500 degrees C. Compared to conventional thermal test, the continuous hightemperature thermal shock can more closely match the operating conditions of hot-end components. The results showed that the RYSZ coatings did not undergo phase transformation in three 10-min thermal shocks, and the degree of sintering decreased with increasing top layer thickness. At the thermal shock surface temperature of 1500 degrees C, the ceramic layer with a total thickness of 360 mu m, 480 mu m, and 600 mu m, respectively, reduced the temperature by 310.7 degrees C, 488.4 degrees C, and 621.3 degrees C. The flaking areas after three thermal shocks were 1.6 %, 1.2 %, and <1 %, respectively, indicating that the RYSZ coatings have good insulating ability. This study provides a strong technical support and theoretical basis for the application of YSZ-doped lanthanides.