Due to the low density and high temperature resistance, the SiCp/A356 composites have great potential for weight reduction and\nbraking performance using the brake disc used in trains and automobiles. But the friction coefficient and braking performance\nare not stable in the braking process because of temperature rising. In this paper, friction and wear behaviors of SiCp/A356\ncomposite against semimetallic materials were investigated in a ring-on-disc configuration in the temperature range of 30âË?Ë?C to\n300âË?Ë?C. Experiments were conducted at a constant sliding speed of 1.4 m/s and an applied load of 200N.Worn surface, subsurface,\nand wear debris were also examined by using SEM and EDS techniques. The third body films (TBFs) lubricated wear transferred\nto the third body abrasive wear above 200âË?Ë?C, which was a transition temperature.The friction coefficient decreased and weight of\nsemimetallic materials increased with the increase of temperature and the temperature had almost no effect on the weight loss of\ncomposites. The dominant wear mechanism of the composites was microploughing and slight adhesion below 200âË?Ë?C, while being\ncontrolled by cutting grooves, severe adhesion, and delamination above the 200âË?Ë?C.
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