铜基体铬合金化对二硫化钼/铜复合材料摩擦学性能的影响及作用机制研究

Effect of Chromium Alloying on Tribological Properties of Molybdenum Disulfide/Copper Composites and Its Mechanism

基于铜基体铬合金化的策略,研究了铬含量对二硫化钼/铜复合材料在氮气气氛下摩擦学性能的影响。结果表明,在复合材料中加入1.5wt%铬,摩擦系数低至0.07,磨损率为2.4×10^(-4)mm^(3)·N^(-1)·m^(-1),分别是未添加铬的复合材料的64%和20%。通过透射电镜、X射线光电子能谱、扫描电镜分别对二硫化钼/铜界面结构、摩擦层成分及磨痕亚表层形貌进行了详细的分析,揭示了铜基体铬合金化对二硫化钼/铜复合材料摩擦学性能的作用机制。

Based on the strategy of chromium alloying of copper matrix,the effect of chromium content on the tribological properties of molybdenum disulfide/copper composites in nitrogen atmosphere was studied.The results indicate that,1.5wt%chromium is added to the composite,with a friction coefficient as low as 0.07 and the specific wear rate is 2.4×10^(-4)mm^(3)·N^(-1)·m^(-1),which is only 64%and 20%of the composite without chromium,respectively.The interface structure,the friction layer composition and the grinding subsurface morphology are analyzed by TEM,X-ray optoelectronic energy spectrum and SEM respectively,and the mechanism of action of molybdenum/copper composite is revealed.