Loughborough University
Leicestershire, UK
LE11 3TU
+44 (0)1509 263171
Loughborough University

Loughborough University Institutional Repository

Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/5623

Title: Ductile deformation in alumina/silicon carbide nanocomposites
Authors: Wu, Houzheng
Roberts, Steve G.
Derby, Brian
Issue Date: 2009
Publisher: © The American Ceramic Society
Citation: WU, H, ROBERTS, S. and DERBY, B., 2009. Ductile deformation in alumina/silicon carbide nanocomposites. 33rd International Conference and Exposition on Advanced Ceramics and Composites, January 18th-23rd 2009, Daytona Beach, Florida.
Abstract: A transmission electron microscope study on cross sections obtained from ground and polished surfaces has revealed that ductile deformation is dominated by dislocations in alumina/silicon carbide nanocomposites containing 1, 5 and 10 vol% silicon carbide particles, and by twinning in unreinforced alumina. The dispersed silicon carbide particles in alumina/silicon carbide nanocomposites restrict the motion of dislocations. A dislocation pinning model is used to compare the possible mechanisms of deformation in alumina and the nanocomposites. Cr-fluorescence piezospectroscopy has been used to characterise the residual stress levels in the materials studied. The measured broadening of the Al2O3/Cr3+ fluorescence peak indicates a dislocation density of 7.3 - 9.7 x 1016 m-2 under the indentations in the nanocomposites, whilst the beneath indentations in alumina is 1-2 orders of magnitude smaller.
Description: This conference paper was presented at the 33rd International Conference and Exposition on Advanced Ceramics and Composites (ICACC): http://ceramics.org/meetings/meetings-archives/icacc09-archive/
Version: Accepted for publication
URI: https://dspace.lboro.ac.uk/2134/5623
Appears in Collections:Conference Papers and Presentations (Computer Science)

Files associated with this item:

File Description SizeFormat
7-16_Wu.pdf348.48 kBAdobe PDFView/Open


SFX Query

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.