【摘要】 将W粉和Se粉按一定比例混合,直接密封在石英管中加热或高能球磨、压片,在Ar气氛中加热,得到了不同形貌的WSe2纳米结构.利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)和透射电子显微镜(TEM、HRTEM)分析了WSe2纳米结构的组成、微观形貌和组织形态;利用UMT-2摩擦试验机考察了WSe2作为HVI500液体基础油添加剂的摩擦磨损性能.研究结果表明:直接密封加热得到的产物为棒状WSe2纳米材料,最小棒直径为6 nm;球磨、压片后加热得到WSe2纳米颗粒,颗粒的平均尺寸在50 nm以下,二者都具有层状结构和良好的结晶性.添加质量分数5%的WSe2纳米材料作为基础油添加剂能够显著降低摩擦系数,减少磨损,增强了材料抗疲劳磨损能力.更多还原

【Abstract】 WSe2 nanoparticles with an average diameter of 30 nm and Club-shaped WSe2 nanostructures of 6 nm diameter were prepared using solid state reaction with the tungsten and selenium powders in Ar atmosphere after high energy ball milling or direct gland.The morphology and microstructure were characterized by using x-ray diffraction,scanning electron microscopy,transmission electron microscopy,and high-resolution transmission electron microscopy.The tribological properties of HVI500 base oil with and without WSe2 nanostructures as additive are investigated on a UMT-2 multispecimen tribotester.Friction coefficient of the base oil containing 5% WSe2 nanostructures is lower than that of the base oil and decreases with increasing load.WSe2 nanostructures are good lubricating additives for HVI500 base oil.更多还原