文献类型：期刊文献

英文题名：Corrosion behavior and thermos-physical properties of a promising Yb2O3 and Y2O3 co-stabilized ZrO2 ceramic for thermal barrier coatings subject to calcium-magnesium-aluminum-silicate (CMAS) deposition: Experiments and first-principles calculation

作者：Fang, Huanjie[1];Wang, Weize[1];Huang, Jibo[1];Li, Yuanjun[1];Ye, Dongdong[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Minist Educ, Key Lab Pressure Syst & Safety, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2021

卷号：182

外文期刊名：CORROSION SCIENCE

收录：;EI(收录号：20210709913722);WOS:【SCI-EXPANDED(收录号:WOS:000630948700002)】；

基金：This research is sponsored by the National Natural Science Foundation of China (Grant No. 51775189), Science and Technology Commission of Shanghai Municipality Project (16DZ2260604), Shanghai Space Science and Technology Innovation Fund (SAST 2019056).

语种：英文

外文关键词：Thermal barrier coatings (TBCs); Calcium-magnesium-alumina-silicate (CMAS); Rare earth doped; First-principles calculation

摘要：In this study, corrosion behavior of Yb2O3-Y2O3 co-stabilized ZrO2 (YbYSZ) was systematically investigated under CMAS melt attack. The result was found that YbYSZ exhibited a better CMAS resistance than yttria stabilized zirconia (YSZ), which was attributed to the excellent phase stability. The degradation of grain caused by CMAS attack was greatly related to the diffusion rate of element substantially. Yb3+ exhibited a low diffusion rate contributing to good phase stability during corrosion. A corresponding first-principles calculation further confirmed this conclusion. Besides, YbYSZ showed a higher thermal expansion coefficient and lower thermal conductivity as compared with YSZ counterpart.