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Evaluation of lapping and polishing damage in brittle materials by quantitative acoustic microscopy

Warren, P. D. and Lawrence, C. W. and Roberts, S. G. and Briggs, G. A. D. and Pecorari, C. and Kolosov, Oleg and PuentesHeras, M. M. (1997) Evaluation of lapping and polishing damage in brittle materials by quantitative acoustic microscopy. In: Advances in the Characterisation of Ceramics. INST MATERIALS, London, pp. 167-176. ISBN 1-86125-025-8

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Abstract

Surface acoustic wave (SAW) velocities have been measured on polished alumina surfaces. It is found that the major changes (increases) in wave speed occur early on in the polishing process, suggesting that long polishing times lead to little improvement in surface quality. There is little correlation between SAW velocity and surface roughness. Quantitative analysis indicates that the effects of surface roughness and residual stress on Rayleigh wave speed should be small; hence the increase in surface wave speed with increased polishing time is most likely to be due to a reduction in the size and density of micro-cracks.

Item Type: Contribution in Book/Report/Proceedings
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 57424
Deposited By: ep_importer_pure
Deposited On: 07 Oct 2012 16:33
Refereed?: No
Published?: Published
Last Modified: 10 Apr 2014 01:24
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/57424

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