Residual stress determination and subsurface microstructure in ground and polished alumina/silicon carbide nanocomposites and monolithic alumina ceramics

HZ Wu, SG Roberts, AJ Winn, B Derby

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

The surface residual stress state induced by grinding and polishing an alumina/silicon carbide nanocomposite and monolithic alumina has been investigated using Hertzian indentation and fluorescence spectroscopy. Specimens were ground and then polished with diamond slurry with grit sizes ranging between 8 μm and 1 μm. The results show that the surface residual stress state in the nanocomposites is more sensitive to surface treatment than that in the monolithic alumina. Surfaces of both ceramics were examined in cross-section by TEM and direct observations were made of the plastic deformation induced by different surface treatments. There is a change in the predominant deformation micromechanism from twinning in the alumina to dislocation generation in the nanocomposites.
Original languageUndefined
Title of host publicationMRS Online Proceedings Library (OPL)
Pages303-308
Number of pages6
VolumeVolume 581 (Symposium F – Nanophase & Nanocomposite Materials II)
DOIs
Publication statusPublished - Jan 2000

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