文献类型：期刊文献

英文题名：Effect of CMAS attack behaviour on stress distribution in double-ceramic-layer thermal barrier coatings

作者：Liu, Yangguang[1];Wang, Weize[1];Wang, Yihao[1];Fang, Huanjie[1];Yang, Ting[1];Li, Kaibin[1];Zhang, Chengcheng[2]

机构：[1]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[2]Aecc Commercial Aircraft Engine Co Ltd, Shanghai 200241, Peoples R China

年份：2023

卷号：49

期号：9

起止页码：13271

外文期刊名：CERAMICS INTERNATIONAL

收录：;EI(收录号：20231113703329);WOS:【SCI-EXPANDED(收录号:WOS:000966461400001)】；

基金：Acknowledgements This research was sponsored by the National Natural Science Foun-dation of China (52175136, 52130511) , Science Center for Gas Turbine Project (P2021-A-IV-002-002) , Shanghai Joint Innovation Program in the Field of Commercial Aviation Engines, National High Technology Research and Development Program of China (2021YFB3702200) , and Key Research and Development Projects in Anhui Province (2022a05020004) .

语种：英文

外文关键词：Thermal barrier coatings (TBCs); Calcium -magnesium -alumina -silicate (CMAS); Stress distribution; Deposition; Penetration

摘要：Stress distribution has a significant effect on crack nucleation and propagation in thermal barrier coatings (TBCs). The stress distribution of different types of double-layer plasma-sprayed coatings, such as YbYSZ/YSZ (YbYSZ: Yb2O3-Y2O3 co-stabilised ZrO2; YSZ: Y2O3 stabilised ZrO2) and YbYSZ/EMAP-YSZ (EMAP-YSZ: embedded micron-agglomerated particle-YSZ) coatings, was numerically studied using the finite element method (FEM) under the condition of thermal shock experiments coupled with calcium-magnesium-alumina-silicate (CMAS) attack. The maximum stress increased with the increasing thickness of CMAS deposition when CMAS was deposited on the coated surface. Among the three coatings of YSZ, YbYSZ/YSZ, and YbYSZ/EMAP-YSZ attacked by CMAS, the stress change of the YbYSZ/EMAP-YSZ coating was lower when CMAS was deposited on the surface of the ceramic layer and penetrated 200 mu m below the original surface but was worse after penetration up to 250 mu m. Furthermore, traditional YSZ in a CMAS environment was also compared to demonstrate the thermal shock life of double-ceramic layer coatings in a better manner. The relationship among CMAS attack, thermal shock, temperature distribution, stress distribution, and cracking initiation of TBC systems has been clarified to provide significant insight in understanding the failure mechanism and important guidance for optimising TBCs to enhance their service life.