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Carbon nanotube/alumina and graphite/alumina composite coatings on stainless steel for tribological applications

Hentour, Karim and Marsal, Alexis and Turq, Viviane and Weibel, Alicia and Ansart, Florence and Sobrino, Jean-Michel and Chen, Yan Ming and Garcia, Julien and Cardey, Pierre-François and Laurent, Christophe Carbon nanotube/alumina and graphite/alumina composite coatings on stainless steel for tribological applications. (2016) Materials Today, 8. 118-126. ISSN 1369-7021

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Official URL: http://dx.doi.org/10.1016/j.mtcomm.2016.07.007

Abstract

Carbon/alumina coatings on stainless steel are prepared by a sol-gel route, using either carbon nanotubes (8 walls on average) or graphite flakes. The friction coefficient against a steel ball is decreased by a factor of 4–5 compared to pure alumina and wear is reduced by a factor of 2 with graphite flakes. A Raman spectroscopy study of selected specimens outside and inside the worn surface shows that the carbon nanotubes are not dramatically damaged whereas the graphite flakes are broken into graphene layers. The reasons why graphite is more effective than the carbon nanotubes, for the same carbon content, to improve the tribological behavior are discussed.

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 Materials Today website : http://www.sciencedirect.com/science/journal/23524928
HAL Id:hal-01486934
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:10 Mar 2017 14:57

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