文献类型：期刊文献

英文题名：Damage Grading Evaluation of Thermal Barrier Coatings under CMAS Corrosion

作者：Liu, Wei[1];Liu, Yangguang[1];Wang, Weize[1];Yang, Ting[1];Zhang, Wenkang[1];Liu, Chen[1];Zhang, Chengcheng[2];Tu, Shantung[1]

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：13

期号：9

外文期刊名：COATINGS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001073258100001)】；

基金：This research was sponsored by the National Natural Science Foundation 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 (2021YFB3702202), and Key Research and Development Projects in Anhui Province (2022a05020004).

语种：英文

外文关键词：thermal barrier coating; CMAS penetration; life stage; crack behavior

摘要：Thermal barrier coatings (TBCs) material has excellent high-temperature resistance and heat insulation performance, which plays a vital role in improving the working efficiency and running life of the engine. During the flight, the engine will inhale dust particles in the air. These particles are mostly from siliceous debris, which are usually called calcium magnesium aluminum silicate (CMAS). At present, CMAS corrosion has become one of the important problems affecting the service life of thermal barrier coatings. In this study, conventional yttrium oxide stabilized zirconia (YSZ) coatings and ytterbium oxide and yttrium oxide co-stabilized zirconia (YbYSZ) coatings were prepared by atmospheric plasma spraying. The two coatings were examined under thermal cycling-CMAS coupling conditions and divided into six life stages. The failure modes, CMAS permeation behavior, crack characteristics and mechanical properties of the two coatings at different life stages were evaluated systematically. The experimental results show that the YbYSZ coating has a longer life than YSZ coating under the thermal cycling and CMAS coupling condition, which increases by about 83% compared with the conventional YSZ coating. In the whole life stage, the porosity of YbYSZ coating is always higher than that of YSZ coating. The phase transition is not the reason for the failure and spalling of the coatings. The crack length of the two coatings showed an increasing trend, but the crack length of the YSZ coating was higher than that of the YbYSZ coating, and the crack density of the two coatings showed a "saddle shape", which was more obvious for the YSZ coating. The YbYSZ coating shows better mechanical properties under the thermal cycling-CMAS coupling condition with the evolution of life.