Effects of interface morphology and TGO thickness on residual stress of EB-PVD thermal barrier coatings

Jianwei Chen; Yang Zhao; Jian Ma

doi:10.1117/12.2084328

1 April 2015 Effects of interface morphology and TGO thickness on residual stress of EB-PVD thermal barrier coatings

Jianwei Chen, Yang Zhao, Jian Ma

Proceedings Volume 9432, Behavior and Mechanics of Multifunctional Materials and Composites 2015; 943212 (2015) https://doi.org/10.1117/12.2084328
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2015, San Diego, California, United States

Abstract

The residual stress of electron beam-physical vapor deposition (EB-PVD) thermal barrier coatings (TBC) is complex and difficult to be obtained. In this paper, the interface morphology of TBCs subjected to cyclic heating and cooling was observed by SEM. Based on the thermal elastic-plastic finite method, corresponding interface model of TBCs was established. The residual stress of EB-PVD TBCs with different interface morphologies and TGO thicknesses was calculated using the FE method without regard to the presence of cracks and defects. The result shows that the distribution of residual stress is significantly affected by the interface morphology, and the growth of TGO also has influence on the residual stress of TC and TGO.

Citation Download Citation

Jianwei Chen, Yang Zhao, and Jian Ma "Effects of interface morphology and TGO thickness on residual stress of EB-PVD thermal barrier coatings", Proc. SPIE 9432, Behavior and Mechanics of Multifunctional Materials and Composites 2015, 943212 (1 April 2015); https://doi.org/10.1117/12.2084328

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