Article

Tribology Letters

, Volume 23, Issue 1, pp 65-75

Wear behaviour of carbon nanotube reinforced epoxy resin composites

  • O. JacobsAffiliated withFachhochschule Lübeck Email author 
  • , W. XuAffiliated withEast China University of Science and Technology
  • , B. SchädelAffiliated withFachhochschule Lübeck
  • , W. WuAffiliated withEast China University of Science and Technology

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Abstract

This paper deals with the effect of a multi-walled carbon nanotube (MWCNT) reinforcement on the wear behaviour of Epoxy (EP) composites. Firstly, various dispersion methods were compared. Secondly, the optimum CNT amount was evaluated. In a third step, dry lubricants were added to the optimised EP/CNT composite. Finally, the influence of the steel counterpart (martensitic bearing steel 100Cr6 and austenitic stainless steel X5CrNi18-10) was studied. The preparation method was found to have a decisive effect on the wear behaviour of the composite. A pre-treatment of the CNTs in concentrated nitric acid proved beneficial. Even more important was the mixing method. A dual asymmetric centrifuge delivered so good wear results that the pre-treatment could be skipped. The optimum CNT content was at about 1 wt%, regardless of the preparation method. The lowest wear rates were found after addition of 10 wt% graphite. MoS2 proved to be less effective and Polytetrafluorethylene (PTFE) even increased the wear. The wear rates against the unalloyed martensitic steel were far higher than against austenitic stainless steel.

Keywords

carbon nanotubes (CNT) epoxy sliding wear dispersion methods