棒状纳米结构WSe2的合成及摩擦学性能研究

摘要

将W粉和Se粉按一定比例混合并经高能球磨、压片后,在Ar气氛中加热固相反应,得到棒状纳米结构的WSe2.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WSe2纳米棒的组成、微观形貌和组织形态；利用UMT-2摩擦试验机考察WSe2纳米棒作为GYT130液体基础油添加剂的摩擦磨损性能.结果表明,产物WSe2为纳米棒状结构,纳米棒平均直径在100 nm以下,最小棒直径为6 nm,具有层状结构和良好的结晶性.在2N载荷、150 r/min转速条件下,质量分数7％的WSe2纳米棒作为GYT130基础油添加剂能够使摩擦因数降低近50％,45#钢试样磨痕宽度降低53％.%Club-shaped WSe2 nanostructures of 6 nm diameters were prepared via solid state reaction with the tungsten and selenium powders in Ar atmosphere after high energy ball milling. The microstructure was characterized by X-ray dif-fractmeter,TEM, and HRTEM. The tribological properties of WSe2 nanostructures as additives in GYT130 base oil were investigated by UMT-2 multispecimen tribotester. Under the load of 2 N and speed of 150 r/min,the friction coefficient and the wear scar width of 45 steel sample are reduced by 50% and 53% separately when lubricated by the GYT130 base oil containing 7%WSe2 nanostructures.