摩擦副对纳米晶铜摩擦学行为的影响

Effect of Friction Pair on Tribological Behavior of Nanocrystalline Copper

采用脉冲电沉积法制备晶粒尺寸为10 nm的纳米晶铜镀层,并使用球盘摩擦磨损试验机研究了其摩擦磨损性能,考察了GCr15和ZrO_(2)两种不同摩擦偶件对纳米晶铜摩擦学行为的影响。通过SEM观察了磨痕、磨屑以及摩擦偶件接触表面的形貌,并使用EDS分析了磨屑的氧元素含量。通过这些分析,解释了两种摩擦副的磨损机理。结果表明,GCr15/Cu的摩擦因数更高且波动较大。磨损机理主要以粘着磨损和疲劳磨损为主,这导致GCr15/Cu的磨损率较高。ZrO_(2)/Cu的摩擦因数更低且更平稳,磨损机理主要以轻微的疲劳磨损为主,这导致其磨损率更低。

The nanocrystalline copper coating with the grain size of 10nm were prepared by pulsed eletctrodeposition.The tribological studies were carried out using a ball-on-disc tribometer.The influences of GCr15 and ZrO_(2)counterpart material on the tribological behaviors of nanocrystalline copper were investigated.SEM was used to observe the morphologies of the wear marks,wear debris and ball counterparts.The oxygen content of the wear debris was analyzed by EDS.By these analyses,the wear mechanism of two friction pairs was explained.The results show that the coefficient of friction of GCr15/Cu is higher with large fluctuation.The wear mechanism is mainly adhesive wear and fatigue wear,which can lead to the high wear rate of GCr15/Cu.ZrO_(2)/Cu,with a lower and more stable coefficient of friction,and the wear mechanism is mainly dominated by slight fatigue wear,which can lead to a lower wear rate.