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The preparation of double-walled carbon nanotube/Cu composites by spark plasma sintering, and their hardness and friction properties

Guiderdoni, Ch. and Estournès, Claude and Peigney, Alain and Weibel, Alicia and Turq, Viviane and Laurent, Christophe The preparation of double-walled carbon nanotube/Cu composites by spark plasma sintering, and their hardness and friction properties. (2011) Carbon, vol. 49 (n° 13). pp. 4535-4543. ISSN 0008-6223

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Official URL: http://dx.doi.org/10.1016/j.carbon.2011.06.063

Abstract

Double-walled carbon nanotube (DWCNT)/copper composite powders were prepared by a rapid route involving freeze-drying without oxidative acidic treatment or ball-milling. The DWCNTs are not damaged and are homogeneously dispersed in the matrix. Dense specimens were prepared by spark plasma sintering. The Vickers microhardness is doubled, the wear against a steel or an alumina ball seems very low and the average friction coefficient is decreased by a factor of about 4 compared to pure copper. The best results are obtained for a carbon loading (5 vol%) significantly lower than those reported when using multi-walled carbon nanotubes (10–20 vol%). Maximum Hertzian contact pressure data could indicate that the surface DWCNTs and bundles of them are deformed and broken, possibly resulting in the formation of a graphitized lubricating tribofilm in the contact

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Carbon wesite: http://www.sciencedirect.com/science/article/pii/S0008622311004994
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
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Deposited By: Denis Faragou
Deposited On:15 May 2012 17:06

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