Investigation of interface damage in metal substrate/ceramic coating

Jinlong Chen; Zhihui Fan; Wenran Gong; Xinhua Ji

doi:10.1117/12.839345

25 August 2009 Investigation of interface damage in metal substrate/ceramic coating

Jinlong Chen, Zhihui Fan, Wenran Gong, Xinhua Ji

Proceedings Volume 7375, ICEM 2008: International Conference on Experimental Mechanics 2008; 73755I (2009) https://doi.org/10.1117/12.839345
Event: International Conference on Experimental Mechanics 2008 and Seventh Asian Conference on Experimental Mechanics, 2008, Nanjing, China

Abstract

In this paper, the FEA software (ABAQUS) is used to establish the theoretical modeling. The stress distribution on the metal substrate/ ceramic coating structure is analyzed, and the reasons for the ceramic failure are found. Different from the former researcher, we consider that the cohesive element is more appropriate to simulate the delamination growth. In the bending simulation process, it is found that the tension stress will reach its peak in the bending centre with the elastic modulus ratio of coating to substrate increases, while the shear stress will reach its peak in the fixed-side with the thickness of the coating decreases. The existence of the interface layer can sharply reduce the stress gradient from ceramic coating to metal substrate. So failure of the coating is mainly caused by the tension stress, and destruction of the edge is mainly produced by the shear stress. During delamination simulation, the length of delamination and the thickness of the ceramic have a development out of direct proportion. The ceramic coating is easy to be caused damage when the thickness of ceramic is thin, otherwise, the structure delamination will easily be caused.

Citation Download Citation

Jinlong Chen, Zhihui Fan, Wenran Gong, and Xinhua Ji "Investigation of interface damage in metal substrate/ceramic coating", Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 73755I (25 August 2009); https://doi.org/10.1117/12.839345

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