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Yaochuan Li,Jianxiang Huang,Man Wang,Junwu Liu,Chengyong Wang,Honghai Zhong,Yang Jiang 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.9
Neoteric copper/sintered–carbon (Cu/SC) composites for pantograph sliders were produced with the method of pressure infiltration. The friction and wear behaviors with or without current and mechanical performances of Cu/SC composites showedthat graphite acted dual effects on Cu/SC, that is, with the addition content of graphite, the electrical conductivity of carbonmatrices increased while the mechanical properties decreased. The friction coefficient and the wear rate decreased with theincrease of the graphite content on dry sliding wear test, and the minimum friction coeffient was only 0.096. Meanwhile,the friction coefficient increased first and then decreased with the current increse, while the wear rate just kept increasing. Scanning electron micrographs revealed a grid-like distribution of copper in the Cu/SC composites. Futhermore, throughobservation and analysis, it was found that Cu/SC composites of pantograph sliders were dominated by adhesive wear andcorrosive wear respectively under two different currents of 5 A and 15 A.