通过粉末冶金热压法成功制备出了具有不同WS2含量的银基复合材料,并对其进行了对偶材料为银盘,湿大气、干氮气和真空条件下,载荷为5 N的球盘式摩擦磨损试验.通过X射线衍射(XRD)、扫描电镜(SEM)、能量色谱(EDS)和X射线光电子能谱对材料的组成,磨屑及磨损表面分别进行表面形貌表征、表面元素分析和元素价键分析.研究表明,摩擦氛围对此类银基复合材料的摩擦学行为具有较大影响,在湿大气中呈现出较高的摩擦系数,而在干氮气中摩擦系数最小.进一步研究表明,摩擦环境对材料摩擦过程中润滑膜的形成具有重要影响,主要是膜的厚度与组成.此外,不同的摩擦环境下,磨粒磨损和分层是此类银基复合材料的主要磨损机制.%Silver based composites containing different amounts of WS2 were prepared by hot-pressing method and their tribological behaviors were investigated against coin silver under humid air, dry nitrogen and vacuum on a ball-on-disk tester with normal load of 5 N. The components of composites, microstructure of debris and worn surface were characterized using XRD SEM, EDS and XPS. It is demonstrated that environmental conditions significantly affect the tribological behavior of silver based composites. The friction coefficient is the highest in humid air, and the lowest in dry nitrogen. It is found that the friction and wear behavior of the composites are strongly depended on the characteristics of the lubrication film forming in different operating environments, such as thickness and composition. In addition, it is indicated that the dominant wear mechanisms of silver based composites are abrasive wear and delamination under different conditions.
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