Friction and wear characteristics of 6061 Al alloy composite reinforced with sub-micron Al₂O₃ particles (Al/Al₂O₃ submicron composite) against commercial semi-metallic brake pad material were determined in dry sliding condition at different loads and sliding speeds using a pad-on-disc configuration. The tribological performance of Al/Al₂O₃ submicron composite was evaluated against conventional grey cast iron brake rotor material under same conditions. The Al/Al₂O₃ submicron composite exhibited lower wear rate than grey cast iron, specifically at brake power intensity (PV) lower than 6 MPa-m/s. Al/Al₂O₃ submicron composite also resulted in much lower wear of the semi-metallic brake pad material at higher brake power intensity (above PV = 6 MPa-m/s) compared to grey cast iron. This is attributed to the better heat dissipation in Al/Al₂O₃ submicron composite causing the brake pad material to operate at much lower temperature. Up to a sliding speed of 2 m/s, a 20% higher coefficient of friction was observed with brake pad material sliding against grey cast iron. Higher sliding speeds were marked with negligible difference in friction. The scanning electron microscope (SEM) with energy-dispersive spectrum (EDS) analyzer was used to examine the morphology and chemical composition of worn surfaces and then investigate the underlying wear mechanisms.

在不同的载荷和滑动速度下，采用干滑动条件，确定了亚微米Al ₂ O ₃颗粒增强的6061铝合金复合材料（Al / Al ₂ O ₃亚微米复合材料）对商用半金属制动片材料的摩擦磨损特性。光盘上的焊盘配置。在相同条件下，针对常规灰铸铁制动转子材料，评估了Al / Al ₂ O ₃亚微米复合材料的摩擦学性能。Al / Al ₂ O ₃亚微米复合材料的磨损率低于灰铸铁，特别是在制动功率强度（PV）低于6 MPa-m / s的情况下。铝/铝₂ O与灰铸铁相比，在较高的制动功率强度（PV = 6 MPa-m / s以上）下，₃亚微米复合材料还导致半金属制动衬块材料的磨损大大降低。这归因于Al / Al ₂ O ₃亚微米复合材料的更好的散热性，导致制动衬块材料在更低的温度下工作。达到2 m / s的滑动速度时，观察到制动衬块材料在灰口铸铁上滑动时摩擦系数提高了20％。较高的滑动速度的摩擦差异可忽略不计。使用具有能量色散光谱（EDS）分析仪的扫描电子显微镜（SEM）来检查磨损表面的形态和化学成分，然后研究潜在的磨损机理。