中文摘要：

将Se粉和Nb粉按一定的比例混合，然后密封在石英管中或压成片状后密封于石英管中，加热到～定温度，分别获得了NbSe2纳米纤维和NbSe2纳米颗粒．采用X射线衍射仪（XRD）、透射电子显微镜（TEM）和扫描电子显微镜（SEM）对所得产物进行了表征，分析了其微观形貌；采用MS-33000摩擦磨损试验机测定了纳米颗粒作为基础润滑油N40添加剂的摩擦学性能．结果表明，制备的纳米纤维直径100～200nm，纳米颗粒直径40—300nm，二者都具有层状结构和良好的结晶性；NbSe2纳米颗粒作为润滑油添加剂具有明显优于基础润滑油的极压减摩性能；同纳米纤维相比，纳米颗粒的减摩性能较好．

英文摘要：

The mixture of Nb and Se powders in stoichiometric ratio were encapsulated in a quartz ampoules or pressed as flakes. After being heated to a desired temperature, NbSe2 nanofibers and nanoparticles were obtained. The morphology of NbSe2 nanomaterials were analyzed by X - ray diffraction, scanning electron microscopy and transmission electron microscopy. The friction and wear of NbSe2 nanomaterials as additive in commercial lubricating oil N40 were initially investigated on a MS -T3000 tribo -meter. The results showed that NbSe2 nanofibers with diameter of 100 - 200 nm and NbSe2 nanoparticles with diameter of 40 - 300 nm had sandwich structure and good crystallinity. The antiwear and friction reducing abilities of N40 with NbSe2 as additive were much better than that of base oil N40. Compared with NbSe2 nanofibers, the nanoparticles have better friction reducing ability.