A Special Method to Evaluate the Strong Adhesion between Brittle Coating and Ductile Substrate

Abstract:

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The evaluation of the interfacial adhesion of coating system has always been a rough task. In this paper, a special testing method of cross-sectional indentation is applied on a model coating system, i.e. electroplated chromium on a steel substrate which is generally regarded as an example of materials pair with strong adhesion. Based on fractography analysis with SEM and interfacial stress simulation with FEM, it is found that interfacial shear stress may induce coating spalling. More interestingly, spalling location is sensitive to substrate pretreatment process. This shows the feasibility of cross-sectional indentation to distinguish interfacial strength at a high level.

Info:

Periodical:

Key Engineering Materials (Volumes 353-358)

Edited by:

Yu Zhou, Shan-Tung Tu and Xishan Xie

Pages:

1749-1752

Citation:

K. Zhang et al., "A Special Method to Evaluate the Strong Adhesion between Brittle Coating and Ductile Substrate", Key Engineering Materials, Vols. 353-358, pp. 1749-1752, 2007

Online since:

September 2007

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$38.00

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DOI: https://doi.org/10.1016/j.engfailanal.2006.02.008

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