Thermal cycling performance of GYbZ/YSZ thermal barrier coatings with different microstructures based on finite element simulation

被引：3
作者：
Jiang, Chengyang [1 ,3 ]
Hao, Wenqi [2 ]
Liu, Changqi [2 ]
Shi, Duoqi [2 ]
Song, Wenjia [1 ,3 ,4 ]
机构：
[1] Beihang Univ, Hangzhou Int Innovat Inst, Hangzhou 311115, Peoples R China
[2] Beihang Univ, Sch Energy & Power Engn, Beijing 100191, Peoples R China
[3] Tianmushan Lab, 166 Shuanghongqiao St, Hangzhou 311115, Peoples R China
[4] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2025年 / 1010卷
基金：
中国国家自然科学基金;
关键词：
Thermal barrier coatings; Thermal cycling test; Finite element simulation; Electron-beam physical vapor deposition (EB-PVD); Ytterbium-doped Gadolinium zirconate; THERMOPHYSICAL PROPERTIES; CRACKING BEHAVIOR; RESIDUAL-STRESS; PART I; TEMPERATURE; DEGRADATION; DURABILITY; EVOLUTION; OXIDATION; FRAMEWORK;
D O I：
10.1016/j.jallcom.2024.177185
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Three (Gd0.9Yb0.1)2Zr2O7/YSZ double ceramic layer (DCL) thermal barrier coatings (TBCs) with different microstructures were manufactured by electron-beam physical vapor deposition (EB-PVD). The thermal cycling behavior of the three TBCs was evaluated comparatively at 1150 degrees C. The results showed that TBCs with small columnar grains exhibited the best thermal cycling performance among all the tested TBCs. The effect of microstructure on thermal cycling behavior, including crack evolution and failure mode was discussed. A finite element model tailored to the microstructural characteristics of the DCL coatings was established. Several inplane stress concentration points appeared in the taller GYbZ column due to discontinuities in strain tolerance resulting from sudden structural or compositional changes. Analysis of the strain energy release rate variation for each concentration point suggested that the predicted delamination position and process aligned with experimental results.
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页数：16
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