Wear behaviour of carbon nanotube reinforced epoxy resin composites |
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Authors: | O Jacobs W Xu B Schädel W Wu |
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Affiliation: | (1) Fachhochschule Lübeck, Stephensonstr. 3, 23562 Lübeck, Germany;(2) East China University of Science and Technology, Songjin Gonglu 1166, Jinshanqu, Shanghai, 101512, P.R. China |
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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. |
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Keywords: | carbon nanotubes (CNT) epoxy sliding wear dispersion methods |
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