Friction Properties of Carbon Nano-Onions from Experiment and Computer Simulations

Autor: Joly-Pottuz, Lucile, Bucholz, E.W., Matsumoto, N., Philipot, S.R., Sinnott, S.B., Ohmae, N., Martin, J.M.
Přispěvatelé: Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Laboratoire de Tribologie et Dynamique des Systèmes (LTDS), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Ecole Nationale d'Ingénieurs de Saint Etienne-Centre National de la Recherche Scientifique (CNRS), Department of Materials Science and Engineering [Gainesville] (UF|MSE), University of Florida [Gainesville] (UF), Department of Mechanical Engineering (DEPARTMENT OF MECHANICAL ENGINEERING), Kobe University
Jazyk: angličtina
Rok vydání: 2010
Předmět:
Zdroj: Tribology Letters
Tribology Letters, Springer Verlag, 2010, 37, pp.75-81
ISSN: 1023-8883
1573-2711
Popis: International audience; The carbon nano-onion can be considered as a new kind of interesting lubricating nanoparticle. Used as lubricant additives, carbon nano-onions lead to a strong reduction of both friction and wear, even at low temperature. To better elucidate the mechanisms by which these processes occur, coupled experimental and computational investigations are carried out. In addition, it is found that lubricious iron oxide nanoparticles are generated in the core of the steel contact through mechanisms that are not yet known. The molecular dynamics simulations of carbon onions placed between sliding diamond-like carbon surfaces at high contact pressure indicate that the lubrication mechanism of the onions is based on a coupled process of rolling and sliding inside the contact area. We conclude that most of carbon onions seem to remain intact under friction processes and do not generate graphitic planes, which is in contrast to the previously determined behavior of MoS2 fullerenes that are mainly exfoliated inside the contact area and liberate lubricating lamellar sheets of h-MoS2.
Databáze: OpenAIRE
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