文献类型：期刊文献

英文题名：Thermal cycling behaviors of different plasma-sprayed zirconate thermal/ environmental barrier coating systems in water vapor atmospheres

作者：Li, Kaibin[1];Wang, Weize[1,2];Yang, Shilong[1];Liu, Yangguang[1];Li, Hongchen[1];Zhang, Wenkang[1];Wang, Changliang[3];Du, Xiuxin[3]

机构：[1]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[2]Shanghai Inst Aircraft Mech & Control, Shanghai 200092, Peoples R China;[3]AECC Beijing Inst Aeronaut Mat, Aviat Key Lab Sci & Technol Adv Corros & Protect A, Beijing 100095, Peoples R China

年份：2024

卷号：218

外文期刊名：MATERIALS CHARACTERIZATION

收录：;EI(收录号：20244317229597);WOS:【SCI-EXPANDED(收录号:WOS:001340031300001)】；

基金：This research was funded by the National High Technology Research and Development Program, China (2023YFB3711200) , National Natural Science Foundation, China (52175136, 52130511) , Science Center for Gas Turbine Project, China (P2021-A-IV-002) , Shanghai Joint Innovation Program in the Field of Commercial Aviation Engines, China, Shanghai Gaofeng Project for University Academic Program Development, China, and Key Research and Development Projects in Anhui Province, China (No. 2022a05020004) . The author thanks the contribution of Research Center of Analysis and Test of East China University of Science and Technology for the help on the characterization.

语种：英文

外文关键词：Zirconate; T/EBCs; Transition layer; Thermal cycling; Water vapor

摘要：As the demand for higher operating temperatures in gas turbine engines, low thermal conductivity thermal/ environmental barrier coatings (T/EBCs) systems are urgently needed to protect the structural components of silicon carbide ceramic matrix composites (SiC CMCs). In this paper, several T/EBCs systems with zirconate as the top layer were prepared by air plasma spraying (APS) on environmental barrier coatings (EBCs) systems, and thermal cycling tests were carried out at 1400 degrees C in a 90 % H2O-balanced O2 water vapor atmosphere. When there were no transition layers, the zirconate top layer produced many horizontal and vertical cracks under severe thermal mismatch stress. When the transition layers existed, the thermal mismatch stress was obviously relieved and the horizontal cracks basically disappeared. The morphology of the vertical cracks in the zirconate top layer varied with the different transition layers, and no obvious cracks were found in both the Yb2Si2O7 or mullite transition layers, indicating that they are highly resistant to crack extension. For the bonding layer, the addition of HfO2 particles into the Si layer significantly suppressed crack propagation. These findings may contribute to laying the foundation for the material and structural design of transition layers in long-life T/EBCs systems.