【摘要】 利用固相反应法在真空石英管中制备出了具有无机类纳米片层状结构的WSe2。对所合成的纳米材料分别用扫描电子显微镜、透射电子显微镜进行表征并对生长机理进行了分析;将其以不同质量分数分散到基础油HVI750中,利用摩擦磨损试验机及非接触式光学轮廓仪初步研究了其摩擦学性能,并通过测量摩擦副接触表面间油膜电阻监测其摩擦表面的成膜情况。结果显示生成物中含有两种尺度的六边形WSe2纳米形貌;含2%(质量比)WSe2润滑油添加剂的油样相对于基础油HVI750在载荷2 N,转速400 r/min,摩擦半径7 mm,实验时间30 min条件下的减摩(摩擦系数0.083)耐磨(比磨损率9.008×10-6mm3.m-1.N-1)性能较佳,平均油膜电阻为95.28 kΩ。因此得出WSe2做润滑油添加剂具有较好减摩抗磨性能,摩擦机理被提出。更多还原

【Abstract】 The WSe2 nanoparticles were synthesized by solid-phase reaction in a quartz tube.The impacts of the vacuum synthesis conditions on the quality of the WSe2 nano-particles were studied.Its microstructures were characterized with scanning electron microscopy and transmission electron microscopy.The tribological properties of the lubricant,well-mixed with the base-oil HV1750 and different concentrations of the WSe2 nano-particles,were evaluated by measuring the electric contact resistance of the liquid films.Two distinctive microstructures of the WSe2 were observed:the dominance of graphite-like,hexagonal laminar structure,several 100 nm in diameter and below 100 nm in thickness,and little amount of the hexagonal nano-rods,100 nm in diameter.The results show that addition of an optimized quantity of laminar-structured WSe2 powders significantly improves the tribological properties of the lubricant.For instance,the lubricant mixed with 2%(wt) of WSe2 displays much lower friction coefficient(0.083) and wear rate(9.008×10-6) than the control sample(base oil HV1750).Possible mechanisms were also discussed.更多还原