Wear Behavior Of Epoxy Research Articles

A novel approach to minimize dry sliding friction and wear behavior of epoxy by infusing fullerene C70 and multiwalled carbon nanotubes

This study investigates an in-depth analysis of chemical, physical, thermal and tribological behavior of infused epoxy matrix for applications lowering of dry friction is targeted. Epoxy substrates were prepared by infusing Fullerene C70 and Multiwalled Carbon Nanotubes in the weight concentration of 1, 3 and 5 wt%. Thermal analysis showed high glass transition temperature of carbon fillers compared to the pure epoxy substrate. These substrates have shown better surface wettability and increased surface energy at higher filler concentration. Friction coefficient and wear rate of tested filler epoxies ranges between 0.07 and 0.29 and 10−3-10−2 mm3/N-m. Increase in filler concentration up to 5 wt% showed significant improvement towards substrate tribological behavior.

Wear behaviour of carbon nanotube reinforced epoxy resin composites

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.