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The Use of Closely Spaced Vickers Indentations to Model Erosion of Polycrystalline α-Al2O3

Published online by Cambridge University Press:  01 February 2011

Adolfo Franco Júnior  and
Steve G. Roberts
Adolfo Franco Júnior
Affiliation:
Núcleo de Pesquisa em Química, Universidade Católica de Goiás, Caixa Postal 86, Setor Universitário, 74605–010 Goiânia-GO, Brazil
Steve G. Roberts
Affiliation:
Department of Materials, University of Oxford Parks Road, Oxford OX1 3PH, UK
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Abstract

Arrays of closely spaced quasi-static indentation were made on specimens of polycrystalline α-Al2O3, mean grain size G=1.2, 3.8 and 14.1 μm. The critical indentation spacing to produce crack coalescence between indentations, and thus significant loss of material from the surface, was determined. These data are compared to results for low-impact-velocity wet erosive wear on the same materials; a good correspondence is found. The indentation data can be used to produce “wear maps”, which provide a guideline for predicting the low-impact-velocity erosive wear resistance of brittle materials.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 843: Symposium T – Surface Engineering-Fundamentals and Applications , 2004 , T3.27
Copyright
Copyright © Materials Research Society 2005

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References

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