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Micro-Indentation Testing with Displacement Rate Changes Applied to Physical Ageing of Paints and Properties of Abs

Published online by Cambridge University Press:  10 February 2011

M. Van Proouen  and
S. Saimoto
M. Van Proouen
Affiliation:
Department of Materials and Metallurgical Engineering, Queen's University, Kingston, ON, Canada, K7L3N6
S. Saimoto
Affiliation:
Department of Materials and Metallurgical Engineering, Queen's University, Kingston, ON, Canada, K7L3N6
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Abstract

Micro-indentation with precision displacement rate changes was used to determine the activation volume of polymeric polished cross-sections and coatings. In the un-pigmented clear ABS, the hardness changes with depth were much smaller than those with the activation volume. It was then hypothesized that the thermally activated portion of the flow stress can be separated from the athermal part and a self-consistent model was developed. In the case of silica modified polyester paint, the hardness increase with depth was correlated to the effective increase in the fraction of the particles with increasing deformation volume. The ageing of the polyester could be clearly demonstrated with large reductions in the activation volume with time.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 522: Symposium T – Fundamentals of Nanoindentation & Nanotribology , 1998 , 181
Copyright
Copyright © Materials Research Society 1998

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