(裝甲兵工程學院 裝備再制造工程系，北京 100072)
摘 要:
采用粉末冶金法制備添加0.75%的納米SiO2(n-SiO2)和0.75%Cu包覆納米SiO2(Cu/n-SiO2)復合粉體的新型銅基摩擦材料。采用慣性臺架實驗機，研究比較兩種材料與未添加納米SiO2的材料的摩擦學性能。結果表明：在銅基摩擦材料中添加微量n-SiO2可改善材料的耐磨性和耐熱性；添加Cu/n-SiO2的銅基摩擦材料，耐熱性提高32%，耐磨性提高2.02倍；添加n-SiO2的摩擦材料，耐熱性提高7%，耐磨性提高18%；經銅包覆處理后的n-SiO2對材料性能的影響優(yōu)于未處理的n-SiO2。
關鍵字: 銅基摩擦材料；納米SiO2；摩擦，磨損；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
