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通过W掺杂固相合成Nb1-xWxSe2,采用X射线衍射、扫描电镜、透射电子显微镜分析了样品中的相成分、微观形貌和元素成分;结果表明随着W掺杂量的增加,其形貌有较大的不同:形貌由规则的微米六方片转变为不规则纳米片和纳米带的混合,且其晶向的相对强度也随W掺杂量的不同发生一定改变。将Nb1-xWxSe2作为润滑油添加剂添加到基础油中,使用UMT-2型摩擦磨损试验机对其摩擦学性能进行测试,并对摩擦机理进行了解释。结果表明:NbSe2六方片作为润滑油添加剂具有良好的减摩抗磨性能,且掺杂W后的Nb1-xWxSe2作为润滑油添加剂的摩擦性能要优于纯的NbSe2,其中以W掺杂量为3%时的Nb1-xWxSe2,其含量为5%(质量比)时的油样摩擦性能最佳,并提出其减摩机理。
The solid phase synthesis of Nb1-xWxSe2 by W doping, the phase composition, the micro-morphology and the elemental composition were analyzed by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The results showed that with the increase of W doping amount, There is a big difference: morphology changes from regular hexagonal sheets to irregular nanosheets and nanoribbons, and the relative intensities of the crystallographic directions also vary with the amount of W doping. Nb1-xWxSe2 was added to the base oil as a lubricating oil additive, the tribological properties of the base oil were tested by UMT-2 friction and wear tester, and the friction mechanism was explained. The results show that NbSe2 hexagonal sheets have good anti-friction and anti-wear properties as lubricant additives, and Nb1-xWxSe2 as a lubricating oil additive has better frictional properties than pure NbSe2 with W doping amount of 3 % Of Nb1-xWxSe2, the content of 5% (mass ratio) of the best friction performance of the oil sample, and proposed its anti-friction mechanism.