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采用粉末冶金法分别制备了添加0.75wt%的纳米SiO2(n-SiO2)和0.75wt%Cu包纳米SiO2(Cu/n-SiO2)复合粉体的新型铜基摩擦材料。采用惯性台架试验机,研究比较了2种材料与未添加纳米SiO2的材料的摩擦学性能。结果表明:添加0.75wt% Cu/n-SiO2的铜基摩擦材料,耐热性提高了32%,摩擦因数更稳定,耐磨性提高了2.02倍。经铜包覆处理后的n-SiO2对材料性能的影响优于未处理的n-SiO2。
A new type of copper-based friction material with 0.75wt% nano-SiO2 (n-SiO2) and 0.75wt% Cu-coated nano-SiO2 (Cu / n-SiO2) composite powder was prepared by powder metallurgy. Using inertial bench test machine, the tribological properties of two kinds of materials and those without nano-SiO2 were compared. The results show that the addition of 0.75wt% Cu / n-SiO2 copper-based friction material improves the heat resistance by 32%, the friction coefficient is more stable and the wear resistance is increased by 2.02 times. The effect of the copper-coated n-SiO2 on the material properties is better than that of the untreated n-SiO2.