文献类型：期刊文献

英文题名：Experimental and Simulation Studies on Thermal Shock of Multilayer Thermal Barrier Coatings with an Intermediate Transition Layer at 1500 °C

作者：Liu, Pengpeng[1];Yang, Shilong[1];Li, Kaibin[1];Wang, Weize[1,2];Liu, Yangguang[1];Yang, Ting[1]

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

年份：2024

卷号：14

期号：12

外文期刊名：COATINGS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001383794800001)】；

基金：This research was funded by the Science Center for Gas Turbine Project (P2021-A-IV-002-002), Civil Space 'the 14th Five-Year Plan' Pre-research Project (D050101), National High Technology Research and Development Program of China (2023YFB3711200), National Natural Science Foundation of China (52175136, 52130511), Shanghai Gaofeng Project for University Academic Program Development.

语种：英文

外文关键词：thermal barrier coatings; multilayer; thermal shock; finite element analysis

摘要：Strain tolerance is a crucial factor affecting the thermal life of coatings, and a higher strain tolerance can effectively alleviate the thermal stresses on coatings during thermal shock. To improve the strain tolerance, the coating structure was optimized by introducing an intermediate transition layer in this study. The intermediate transition layer material was prepared using a 1:1 volume ratio mixture of 6-8 wt. % Yttria-stabilized zirconia (YSZ) and NiCrAlY powders in the experiments. The coating structure consisted of an Al2O3-GdAlO3 (AGAP) anti-erosion layer, a YSZ layer, an intermediate transition layer, and a bonding layer from top to bottom. After thermal shock experiments at 1500 degrees C, the coatings with the addition of the intermediate transition layer exhibited different failure modes, with the crack location shifting from between the YSZ and the bonding layer to within the intermediate transition layer, compared to the coatings without the intermediate transition layer. Finite element simulation analysis showed that the intermediate transition layer effectively increased the strain tolerance of the coating and significantly reduced the thermal stress. Furthermore, incorporating an embedded micron agglomerated particle-based (EMAP) thermal barrier coating structure into the intermediate transition layer effectively alleviated thermal stresses and enhanced the coating's thermal insulation performance.