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A series of experiments on friction and wear properties of carbon strip rubbing against copper contact wire is
performed on high-speed friction and wear tester with electric current. The results show that the friction coefficient is
generally maintained between 0.24 and 0.37. In the absence of electric current, the coefficient of friction is higher than
that in the presence of electric current. The wear rate of carbon strip materials is generally not more than 0.014g/km. In
particular, the wear rate under the electric current of 240 A is 14 times more than that in the absence of electric current.
By observing the scar of worn surface with optical microscope, it can be found that there are obvious slip scars and arc
erosive pits. The dominated wear mechanisms are abrasive wear and arc erosion in electrical sliding frictional process.