(装甲兵工程学院 装备再制造工程系，北京 100072)
摘 要:
采用粉末冶金法制备添加0.75%的纳米SiO2(n-SiO2)和0.75%Cu包覆纳米SiO2(Cu/n-SiO2)复合粉体的新型铜基摩擦材料。采用惯性台架实验机，研究比较两种材料与未添加纳米SiO2的材料的摩擦学性能。结果表明：在铜基摩擦材料中添加微量n-SiO2可改善材料的耐磨性和耐热性；添加Cu/n-SiO2的铜基摩擦材料，耐热性提高32%，耐磨性提高2.02倍；添加n-SiO2的摩擦材料，耐热性提高7%，耐磨性提高18%；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。
关键字: 铜基摩擦材料；纳米SiO2；摩擦，磨损；粉末冶金
（Department of Arming Remanufacture Engineering, Academy of Armored Force Engineering, Beijing 100072, China）
Abstract:Two types of Cu-based friction materials with 0.75% nano-SiO2 and 0.75% Cu-coated nano-SiO2 (Cu/nano- SiO2) were obtained by powder metallurgy processes, respectively. The tribological properties of the two types of friction materials were investigated by using inertia friction tester and compared with that of the friction materials without nano-SiO2. The results show that a small quantity of nano-SiO2 can improve the heat resistance and the wear resistance of the friction materials, the heat resistance and the wear resistance of the friction materials with 0.75% Cu/nano-SiO2 are respectively improved by 32% and 2.02 times. While for the friction materials with 0.75% nano-SiO2, the heat resistance and the wear resistance are improved by 7% and 18%, respectively. Cu-coated nano-SiO2 exists a more obvious effect on the tribological properties than nano-SiO2.
Key words: Cu-based friction material; nano-SiO2; friction; wear; powder metallurgy
