环境压强对电刷镀In/Ni固体润滑涂层摩擦学性能的影响  

Influence of Environmental Pressures on Tribological Properties of In/Ni Lubricating Layers Deposited by Electrical Brushing

作　　者：马国政[1] 徐滨士[1] 王海斗[1] 

机构地区：[1]装甲兵工程学院装备再制造技术国防科技重点实验室,北京100072

出　　处：《真空科学与技术学报》2011年第2期154-158,共5页Chinese Journal of Vacuum Science and Technology

基　　金：国家973计划(2007CB607601);北京自然基金(3072011)

摘　　要：为了探索软金属铟在真空环境中的润滑性能,用电刷镀技术在45#钢表面制备了In/Ni复合固体润滑涂层,并对比研究了该复合镀层在大气环境、低真空环境和高真空环境下的摩擦学性能和磨损机制。结果表明,In/Ni镀层具有良好的减摩和抗磨性能,随着环境压强的降低,In/Ni镀层的摩擦学性能明显提高,镀层的磨损机制主要为粘着磨损和疲劳磨损。分析认为,不同环境压强下镀层摩擦学性能的差异,主要与镀层的氧化和软化有关。The solid indium and indium/nickel（In/Ni） composite lubricating coatings were deposited by electrical brushing technique on 45# steel substrates to simulate their tribological properties and wear mechanisms in air,in vacuum and in high vacuum.The microstructures and mechanical properties of the In and In/Ni coatings were characterized with X-ray diffraction,scanning electron microscopy,conventional mechanical probes.The results show that the In and In/Ni coatings can significantly improve the mechanical properties.For instance,it decreases the friction coefficient,and increases the wear resistance.As the pressure drops from atmospheric pressure to low（1 Pa） and high vacuum（1×10-5 Pa）,its tribological properties improves markedly.We suggest that the adhesive wear and fatigue wear be the wear mechanisms,and that oxidation and softening of In and/or In/Ni coatings be responsible for the improvement of the tribological properties with a decrease of pressure.

关 键 词：真空环境 In/Ni复合镀层 固体润滑 摩擦磨损 

分 类 号：TH117.3[机械工程—机械设计及理论]