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Residual Stresses and Deformation around Indentations in Alumina/SiC Nanocomposites

Published online by Cambridge University Press:  26 February 2011

Apichart Limpichaipanit  and
Richard Ian Todd
Apichart Limpichaipanit
Affiliation:
Department of Materials, University of Oxford, Parks Road, Oxford, OX1 3PH, United Kingdom
Richard Ian Todd
Affiliation:
Department of Materials, University of Oxford, Parks Road, Oxford, OX1 3PH, United Kingdom
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Abstract

Format

This is a copy of the slides presented at the meeting but not formally written up for the volume.

Abstract

Alumina/SiC nanocomposites are more wear resistant and have better surface finish than pure alumina of a similar grain size. Grain pullouts caused by intergranular fracture are observed on worn surfaces of alumina whereas only a few pullouts resulting from transgranular fracture and scratches caused by plastic deformation are the main features of a worn surface of nanocomposites. Surface mechanical properties were investigated under idealised conditions using indentations. The stress around the indentations was investigated by Cr3+ fluorescence microscopy. The experiments were carried out using a variety of microstructures and varied indentation loads. In addition, the surface damage below indentations and worn surfaces was examined by Transmission Electron Microscopy (TEM). TEM samples were prepared by Focused Ion Beam (FIB) milling directly from the surface.

Keywords

microstructurecompositescanning electron microscopy (SEM)
Type
Slide Presentations
Information
MRS Online Proceedings Library (OPL) , Volume 977: Symposium FF – Solution Processing of Inorganic and Hybrid Materials for Electronics and Photonics , 2006 , 977-FF04-28
Copyright
Copyright © Materials Research Society 2006

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