Comparative Study of Three Typical Copper-based Brake Pads in Structure and Performance

Aiming at the problem of low friction coefficient, bad stability and high wear, the conventional copper based brake pad is designed in this paper. In this paper, Cu, Fe, Ni and Sn were added as reinforcing elements, Graphite and MoS2 were used as lubricant, and mullite, SiC and zircon were used as friction components. Copper based brake pads were prepared by cold pressing and hot-pressing at 880℃, and their phase was analyzed by X ray diffractometer. The density, the hardness, the friction coefficient and the wear loss were measured. The wear scar was observed by SEM and the energy spectrum analysis was carried out. It was found that the wear rate of the prepared Cu Based Brake Pad was 2.9 mg·(N·m)-1, Friction Coefficient was 0.34~0.41, and the structure was fine and even. The wear mechanism is composed of abrasion, adhesion and fatigue wear, and oxidative wear takes place at high temperature. By comparison with the structure and performance of similar foreign materials, it is possible to select different application cases.