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Title: Hardness of alumina/silicon carbide nanocomposites at various silicon carbide volume percentages
Authors: Wade, James
Wu, Houzheng
Keywords: Vickers hardness
Indentation size effect
Ceramic nanocomposites
Dislocations
Indentation
Issue Date: 2013
Publisher: © The American Ceramic Society. Published by John Wiley & Sons
Citation: WADE, J. and WU, H., 2013. Hardness of alumina/silicon carbide nanocomposites at various silicon carbide volume percentages. IN: Mathur, S. et al. (eds) Ceramic Engineering and Science Proceedings. Nanostructured Materials and Nanotechnology VII. Hoboken, NJ, USA: John Wiley & Sons, Inc. 34 (7), pp. 119 - 130.
Abstract: Vickers indentation was employed to measure the microhardness of monolithic alumina and six alumina-based nanocomposites consisting of variable silicon carbide nanoparticle volume percentages of 0.3% to 20%. Indentation tests were performed over a broad range of loads from 0.5N to 40N. The resultant hardness-load curves exhibit cumulative increases in the apparent hardness based on the silicon carbide content and reveal each sample suffers from a prominent indentation size effect (ISE). Herein, we present a comprehensive analysis of this data using Meyer’s Law, the proportional specimen resistance model (PSR) and the modified proportional specimen resistance model (MPSR) and employ TEM imagery to detail potential mechanisms by which silicon carbide nano-reinforcements influence the “true hardness” and the ISE.
Description: Presented at the 37th International Conference and Expo on Advanced Ceramics and Composites (ICACC'13), Daytona Beach, Florida.
Version: Accepted for publication
DOI: 10.1002/9781118807828.ch11
URI: https://dspace.lboro.ac.uk/2134/14540
Publisher Link: http://dx.doi.org/10.1002/9781118807828.ch11
ISBN: 9781118807828
Appears in Collections:Conference Papers and Presentations (Materials)

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