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Hardness of Thin Polymer Coatings on Glass

Published online by Cambridge University Press:  25 February 2011

J. E. Ritter ,
D.R. Sioui ,
W. Gu  and
T.J. Lardner
J. E. Ritter
Affiliation:
Mechanical Engineering Department, University of Massachusetts Amherst, MA 01003
D.R. Sioui
Affiliation:
Mechanical Engineering Department, University of Massachusetts Amherst, MA 01003
W. Gu
Affiliation:
Mechanical Engineering Department, University of Massachusetts Amherst, MA 01003
T.J. Lardner
Affiliation:
Mechanical Engineering Department, University of Massachusetts Amherst, MA 01003
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Abstract

For a soft coating on a hard substrate the overall hardness of the coating/substrate system increases substantially when the indenter penetrates into the substrate sincethe substrate can now directly support some of the indenter load. A model for the overall hardness is developed by accounting for the indentation load shared by the coating andsubstrate. This model accounts for the additional load supported by the coating due to the pile-up of coating material underneath the indenter. The model predicts the overall hardness as a function of coating and substrate bulk hardness and coating thickness. Comparison of the model to experimental data for two polymer coatings (epoxy and epoxy acrylate) on soda-lime glass substrates shows good agreement.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 203: Symposium D – Electronic Packaging Materials Science V , 1990 , 141
Copyright
Copyright © Materials Research Society 1991

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References

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