MoS_2对铝基材料摩擦磨损性能的影响

Effect of MoS_2 on tribological properties of aluminum matrix composite materials

以Al,Fe,Zn等金属粉末和Si粉为原料,采用热压法制备MoS2含量（质量分数）分别为0和3%的铝基复合材料,在滑动速度为0.377-1.131 m/s以及载荷为4-10 N的条件下进行摩擦试验,研究MoS2对铝基复合材料摩擦磨损性能的影响。结果表明：在0.377 m/s的滑动速度下,3%MoS2/铝基复合材料在10 N载荷下具有较低的平均摩擦因数0.4,比不含MoS2材料的摩擦因数降低近一半;在0.755 m/s的滑动速度下,2种材料的摩擦因数和磨损率接近;在1.131 m/s的滑动速度下,载荷7-10 N时2种材料都严重磨损,3%MoS2/铝基材料具有相对较低的磨损率,磨损机理为熔化磨损,未添加MoS2材料的磨损机理为严重塑性变形磨损。添加3%MoS2可显著改善铝基材料的摩擦磨损性能。

Aluminum matrix composite materials with MoS2 mass fraction of 0% and 3% were fabricated by hot press method using Al, Fe, Zn and Si powders as raw materials. The tribological properties of aluminum matrix materials with MoS2 content of 3% and 0% were studied comparatively at sliding speed of 0.377-1.131 m/s and load of 4-10 N. The results show that at the sliding speed of 0.377 m/s, the aluminum matrix material with 3% MoS2 has lower average friction coefficient of 0.4 which is 1/2 lower than that of the material with 0% MoS2 under load of 10 N; at the sliding speed of 0.755 m/s, the tribological properties of the two aluminum matrix materials are similar; at the sliding speed of 1.131 m/s and load of 7-10 N, although two materials wear severely, the materials with 3% MoS2 has lower wear rate than that of material with 0% MoS2, and the wear mechanism of aluminum matrix materials with 3% and 0% MoS2 is melting wear and plastic deformation, respectively. It can be seen from the results that addition of 3% MoS2 can improve tribological properties of aluminum matrix materials obviously.