文献类型：期刊文献

英文题名：Interfacial texture-driven failure behaviors of Gd/Yb co-doped YSZ thermal barrier coatings under thermal cyclic loading: Design and optimization

作者：Yang, Kehan[1];Shi, Junmiao[1];Zhang, Kaiming[1];Chen, Xiaolong[2];Tian, Fuqiang[1];Wu, Song[3,4];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;[3]Dongfang Turbine Co LTD, Dongfang Elect Corp, Deyang 618000, Peoples R China;[4]State Key Lab Clean & Efficient Turbomachinery Pow, Deyang 618000, Peoples R China

年份：2025

卷号：36

起止页码：2207

外文期刊名：JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T

收录：;EI(收录号：20255219801031);WOS:【SCI-EXPANDED(收录号:WOS:001462346400001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (52375146) .

语种：英文

外文关键词：Thermal barrier coatings; Interfacial texture; Thermal cyclic loading; Microstructure; Failure

摘要：Double ceramic layer (DCL) thermal barrier coatings (TBCs) with excellent thermal shock resistance have been developed but are weakest at the inter-ceramic interface. It is desirable to improve the interfacial bonding between the ceramic layers to further enhance service reliability. In this study, an interfacial texture deposition strategy was proposed to strengthen the inter-ceramic interface of the self-developed DCL TBCs. Specifically, eight interfacial textures were deposited at the interfaces between YSZ and RYSZ (where R represents two rareearth oxides, Gd2O3 and Yb2O3, R = 6.5 wt%) layers, followed by thermal cycling tests to explore their critical roles in the failure behaviors of DCL TBCs. Microstructural evolutions, phase compositions, and stress variations were investigated in detail. The relationship between texture and interfacial separation was identified. A denser texture spacing led to a smaller flaking area. Ultimately, the coating performance reached its optimum when the interfacial texture had a diameter of 2.5 mm, a spacing of 1.5 mm, and a height of 200 mu m. After 230 thermal cycles at 1150 degrees C, the flaking area was only 23 % of that observed in untextured TBCs, and the layer RYSZ did not undergo phase transformation. This study provides theoretical support for interfacial texture and lanthanide-doped YSZ design of TBCs.