α-MnO2纳米线作为润滑油添加剂的摩擦磨损性能研究

摘要

α-MnO2 nanowires were prepared by hydrothermal method.The prepared α-MnO2 nanowires with different diameters were characterized by X-ray diffraction (XRD) and transition electron microscope (TEM).The tribological properties of α-MnO2nanowires as additives in the liquid paraffin were investigated by vertical universal friction and wear testing machine.It was found that the addition of α-MnO2 nanowires did not influence much about friction coefficient, but greatly reduced the wear rate.The wear rate was relative with the diameter of α-MnO2 nanowires additives.α-MnO2 nanowire with diameter of 17 nm showed the lowest wear rate of 3.28×10-15 m3·N-1·m-1, reduced by about 50%.Based on the study results, the paper concluded a possible anti-wear mechanism of α-MnO2nanowires as additive in the liquid paraffin.%采用水热方法制备出不同直径的α-MnO2纳米线,利用X射线衍射仪,比表面仪和透射电镜对样品进行了表征,利用立式万能摩擦磨损试验机对α-MnO2纳米线作为液体石蜡添加剂的摩擦磨损性能进行了研究.研究结果表明,添加纳米润滑油添加剂后,销的摩擦系数改变不明显,但磨损率显著降低.磨损率与α-MnO2纳米线添加剂的直径密切相关,当纳米材料的粒径为17nm时磨损率最低,磨损率值降低为3.28×10-15 m3·N-1·m-1,降低了约50%.并得出了α-MnO2纳米线在液体石蜡中可能的抗磨损机理.