文献类型：期刊文献

英文题名：Lanthanide co-doped YSZ double-ceramic-layer thermal barrier coatings: Unlocking superior sintering resistance, thermal durability, and insulation for extreme environments

作者：Yang, Kehan[1];Shi, Junmiao[1];Tian, Fuqiang[1];Chen, Xiaolong[2];Zhang, Kaiming[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：504

外文期刊名：SURFACE & COATINGS TECHNOLOGY

收录：;EI(收录号：20251318110310);WOS:【SCI-EXPANDED(收录号:WOS:001455287200001)】；

语种：英文

外文关键词：Thermal barrier coating; Co-doped modification; Phase stability; Sintering resistance

摘要：The phase instability and poor sintering resistance of conventional 8YSZ limit its use in advanced thermal barrier coatings (TBCs). To overcome these limitations, a novel Gd and Yb co-doped YSZ (RYSZ) powder was developed and used to fabricate the double-ceramic-layer (DCL) RYSZ/8YSZ TBC via atmospheric plasma spraying (APS), which were systematically compared with single-layer RYSZ and 8YSZ TBCs. RYSZ exhibited excellent phase stability, with no transformation after 200 h at 1400 degrees C, unlike 8YSZ, where m-ZrO2 phase increased from 0 % to 34.2 %. The DCL TBC showed superior sintering resistance, with porosity reductions of only 29.89 % after 200 h at 1150 degrees C, compared to 73.94 % for the single-layer 8YSZ TBC. In thermal shock cycling, the DCL TBC remained intact after 60 cycles, outperforming single-layer RYSZ and 8YSZ TBCs, which failed at 35 and 40 cycles, respectively. Additionally, the DCL TBC achieved excellent thermal insulation, with a 313.4 degrees C temperature drop at 1500 degrees C. The DCL RYSZ/8YSZ structure emerges as the optimal configuration, combining phase stability, sintering resistance, and thermal durability, paving the way for next-generation TBCs in extreme environments.