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采用粉末冶金的方法制备出含纳米NbSe2(1%~9%(质量比))的铜-石墨复合材料。在UMT-2及超低温摩擦磨损试验机上进行材料摩擦实验,通过X射线衍射仪、扫描电子显微镜分析其物相及磨痕形貌,并探论了复合材料在大气、真空试验条件下的磨损机理。结果表明:加入NbSe2可显著提高铜基复合材料的摩擦学性能;真空干摩擦条件下添加NbSe2(5.5%)自润滑材料的摩擦因数更小(μ=0.185),承载能力更高。其磨损机理是粘着磨损、接触疲劳磨损共同作用的结果。
The copper-graphite composite containing nano-NbSe2 (1% ~ 9% (mass ratio)) was prepared by powder metallurgy. The material friction test was carried out on the UMT-2 and ultra-low temperature friction and wear testing machine. The phase and wear scar morphology were analyzed by X-ray diffraction and scanning electron microscopy. The wear mechanism of the composite under atmospheric and vacuum test conditions . The results show that the addition of NbSe2 can remarkably improve the tribological properties of the copper matrix composites. The addition of NbSe2 (5.5%) under dry-friction condition has a smaller friction coefficient (μ = 0.185) and higher bearing capacity. The wear mechanism is adhesive wear, contact fatigue and wear together.