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Reducing wear and stabilizing the coefficient of friction (COF) are always frontier issues in the field of automobile braking materials. In this study, the wear resistance of carbon materials and the friction stability of porous materials were combined. Rice husk carbon (RHC) was prepared via vacuum pyrolysis, and the effects and mechanism of RHC contents on the tribological properties of non-asbestos organic braking composite materials (NAOBCM) were studied. The RHC was a porous carbon material mainly containing amorphous carbon and silicon dioxide (SiO 2 ). The COF was improved and stabilized, and the wear resistance was significantly enhanced by adding low-dose RHC. The optimal performance was achieved at 4wt% RHC. As for the mechanism, the porous structure of RHC can prevent stress expansion on the worn subsurface, thus alleviating delamination wear and decreasing the number of large-size abrasive debris. As a result, the abrasive wear is relieved. Finally, the smaller peel-off pits and ploughs reduces roughness and improves the performance.

Tribological Properties and Mechanism of Rice Husk Carbon Reinforced Non-Asbestos Organic Braking Composite Material