The preparation of carbon nanotube (CNT)/copper composites and the effect of the number of CNT walls on their hardness, friction and wear properties

Abstract : Carbon nanotubes with 2, 3, 8 and 20 walls are mixed with a copper powder (micrometer sized) and consolidated by spark plasma sintering. The microhardness of resulting composites is found to be over 50% higher than that for Cu and the friction coefficient against a steel ball is decreased by a factor of 3-4 while the wear and wear rate are reduced by a factor of 10-20. Raman maps of selected specimens outside and inside the worn surface show that double-wall carbon nanotubes remain intact. The reasons for the effect of the number of walls and carbon content are discussed.
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Submitted on : Thursday, October 3, 2013 - 2:28:32 PM
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Christophe Guiderdoni, Ekaterina Pavlenko, Viviane Turq, Alicia Weibel, Pascal Puech, et al.. The preparation of carbon nanotube (CNT)/copper composites and the effect of the number of CNT walls on their hardness, friction and wear properties. Carbon, Elsevier, 2013, vol. 58, pp. 185-197. ⟨10.1016/j.carbon.2013.02.049⟩. ⟨hal-00869492⟩

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