Journal
CERAMICS INTERNATIONAL
Volume 39, Issue 6, Pages 6251-6263Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2013.01.046
Keywords
Composites; Hardness; Vickers indentation; Numerical simulation
Categories
Funding
- FEDER funds through the programme COMPETE-Programa Operacional Factores de Competitividade
- FCT-Fundacao para a Ciencia e a Tecnologia [PEst-C/EME/UI0285/2011]
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The main difficulty in the mechanical characterisation of thin films using depth-sensing indentation is the determination of the relative substrate and film contributions to the measured properties of the film/substrate composite. In this study, a three-dimensional numerical simulation of the Vickers hardness test is used to study the influence of the substrate and film mechanical properties on the composite's behaviour under depth-sensing indentation. The particular case of hard films on soft substrates is analysed. In order to understand the behaviour of the composite, a study of the plastic strain distribution under indentation of several composites is performed. A methodology to determine the relative film hardness, i.e. H-F/H-S ratio, is proposed. The methodology is successfully verified using fictitious and real composite materials. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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