Friction and wear behaviors of copper rubbing against carbon material with and without windy conditions

摘要

An experimental study on friction and wear properties of carbon strip rubbing against copper contact wire was carried out on a pin-on-disc frictional tester with and without windy conditions. The result shows that wear rate of pin specimen increases observably with increasing sliding distance with and without windy conditions. However, the coefficient of friction slightly decreases with increasing electric current with and without the windy conditions. Through observing the SEM morphology of pin specimens, it can be found that the delamination wear is a main wear mechanism in windless conditions. While arc erosion is a dominant wear mechanism in windy conditions. Worn surfaces of the materials were analyzed by an energy dispersive X-ray spectroscopy. It can be observed that the oxidation wear occurs in the frictional process due to arc erosion and significant temperature rise.