纳米SiO2形态对铜基摩擦材料摩擦学性能的影响

Effect of nano-SiO2 on Tribological Properties of Cu-based Friction Materials

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。

Two types of Cu-based friction materials with 0.75 wt% nano-SiO2 and 0.75 wt% Cu-coated nano-SiO2 （Cu/nano-SiO2） are prepared with respectively powder metallurgy processes. The tribological properties of the two types of friction materials are studied and compared by using inertia friction tester. The results show that the heat resistance and wear resistance of the friction materials with 0.75 wt% Cu/nano-SiO2 have been respectively improved by 32% and 2.02 times. At the same time, the friction coefficient becomes more stabe. The Cu-coated nano-SiO2 has a more effective influence on the tribological properties than the untreated nano-SiO2.