A coupled theory for deformation and phase transformation due to CMAS infiltration and corrosion of thermal barrier coatings

被引：29

作者：

Xu, Guangnan ^{[1
]}

Yang, Li ^{[1
,2
]}

Zhou, Yichun ^{[1
,2
]}

机构：

[1] Xiangtan Univ, Sch Mat Sci & Engn, Xiangtan 411105, Hunan, Peoples R China

[2] Xidian Univ, Sch Adv Mat & Nanotechnol, Xian 710126, Shaanxi, Peoples R China

来源：

CORROSION SCIENCE | 2021年 / 190卷

基金：

中国国家自然科学基金;

关键词：

Thermal barrier coatings; Calcium-magnesium-alumino-silicates; Phase transformation; Phase field; FIELD SIMULATION; MAGNESIUM; DEGRADATION; MECHANISMS; FAILURE; MICROSTRUCTURE; DIFFUSION;

D O I：

10.1016/j.corsci.2021.109690

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This work proposes a mechanism-based phase-field approach for tetragonal-to-monoclinic transformation in thermal barrier coatings (TBCs) corroded by calcium-magnesium-alumino-silicates (CMAS). A 2D plate model is established and verified by experiments results of the distribution of CMAS mass density and the extension of the monoclinic phase after different heating times. In addition, the simulation results show that the tensile stress accumulates in the interface between two phases, which can be seen as the motivation for horizontal cracks in TBCs. The theoretical model presented here shows excellent capacities to capture the evolution of the monoclinic phase in TBCs corroded by CMAS.

引用

页数：13

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