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.
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Acknowledgments
The authors would like to thank some colleagues from the Fachhochschule Lübeck for their support and helpful discussions: Prof. B. Voß conducted the SEM investigations, Dipl.-Ing. E.-O. Reimann introduced us to the viscosity measurements and provided the according test rig, Ms A.-Ch. Heidenreich and Dipl.-Ing. A. Frederich made the equipment available needed for the pre-treatment in nitric acid. Altropol, Stockelsdorf, Germany supplied the epoxy resin free of charge.
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Jacobs, O., Xu, W., Schädel, B. et al. Wear behaviour of carbon nanotube reinforced epoxy resin composites. Tribol Lett 23, 65–75 (2006). https://doi.org/10.1007/s11249-006-9042-7
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DOI: https://doi.org/10.1007/s11249-006-9042-7