Friction and wear behaviors of ionic liquid of alkylimidazolium hexafluorophosphates as lubricants for steel/steel contact
Friction and wear behaviors of ionic liquid of alkylimidazolium hexafluorophosphates as lubricants for steel/steel contact
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DOI：
10.1016/s0043-1648(03)00255-2
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发表时间：
2004
期刊：
影响因子：
5
通讯作者：
Haizhong Wang;Qiming Lu;Chengfeng Ye;Wei-min Liu;Z. Cui
中科院分区：
文献类型：
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作者：
Haizhong Wang;Qiming Lu;Chengfeng Ye;Wei-min Liu;Z. Cui
制备了六氟磷酸烷基咪唑类离子液体，并对其作为钢/钢接触润滑剂进行了评价。在Optimol SRV环境振动摩擦磨损试验机和1×10−3Pa CZM真空摩擦试验机上研究了合成离子液体作为润滑剂的摩擦学性能。合成的离子液体具有优异的摩擦学性能，优于含2wt液体石蜡的常规润滑剂。二烷基二硫代磷酸锌（ZDDP）的减摩能力和承载能力。利用扫描电子显微镜（SEM/EDS）和x射线光电子能谱仪（XPS）分析了钢表面生成的边界膜的元素组成和化学性质。SEM结果显示，六氟磷酸烷基胺唑离子液体润滑后，磨损表面有轻微的磨损和磷，XPS结果表明，滑动过程中离子液体与铁发生了摩擦化学反应，生成了fepo4和FeF2。
Ionic liquids of the alkylimidazolium hexafluorophosphate type were prepared and evaluated as lubricants for the contact of steel/steel. Their tribological properties of the synthetic ionic liquid as the lubricants were investigated on an Optimol SRV oscillating friction and wear tester in ambient condition and on a CZM vacuum friction tester at 1×10−3Pa. These synthetic ionic liquids show excellent tribological performance and are superior to the conventional lubricant of liquid paraffin containing 2wt.% of zinc dialkyldithiophosphate (ZDDP) in terms of the friction-reduction ability and load-carrying capacity. The elemental composition and chemical nature of the boundary films generated on the steel surface were analyzed on a scanning electron microscope with a Kevex energy dispersive X-ray analyzer attachment (SEM/EDS) and X-ray photoelectron spectrometer (XPS). The SEM results showed light abrasion and phosphorus on the worn surface after lubrication with the ionic liquids of alkylimidazolium hexafluorophosphates, and the XPS results indicated the occurrence of the tribochemical reaction of ionic liquid with iron during the sliding process, with the formation of FePO4and FeF2.