A magnetic ionic liquid (abridged as MIL) [C₆mim]₅[Dy(SCN)₈] was prepared and used as the magnetic lubricant of a steel-steel sliding pair. The tribological properties of the as-prepared MIL were evaluated with a commercially obtained magnetic fluid lubricant (abridged as MF; the mixture of dioctyl sebacate and Fe₃O₄, denoted as DIOS-Fe₃O₄) as a control. The lubrication mechanisms of the two types of magnetic lubricants were discussed in relation to worn surface analyses by SEM-EDS, XPS, and profilometry, as well as measurement of the electric contact resistance of the rubbed steel surfaces. The results revealed that the MIL exhibits better friction-reducing and antiwear performances than the as-received MF under varying test temperatures and loads. This is because the MIL participates in tribochemical reactions during the sliding process, and forms a boundary lubrication film composed of Dy₂O₃, FeS, FeSO₄, nitrogen-containing organics, and thioether on the rubbed disk surface, thereby reducing the friction and wear of the frictional pair. However, the MF is unable to form a lubricating film on the surface of the rubbed steel at 25 °C, though it can form a boundary film consisting of Fe₃O₄ and a small amount of organics under high temperature. Furthermore, the excessive Fe₃O₄ particulates that accumulate in the sliding zone may lead to enhanced abrasive wear of the sliding pair.

制备了一种磁性离子液体（缩写为MIL）[C ₆ mim] ₅ [Dy（SCN）₈ ]，并将其用作钢制滑动副的磁性润滑剂。用市售的磁性流体润滑剂（缩写为MF；癸二酸二辛酯和Fe ₃ O ₄的混合物，表示为DIOS-Fe ₃ O _4）评估制得的MIL的摩擦学性能。）作为控件。讨论了两种类型的磁性润滑剂的润滑机理，涉及通过SEM-EDS，XPS和轮廓测量法进行的磨损表面分析，以及摩擦钢表面的电接触电阻的测量。结果表明，在变化的测试温度和负载下，MIL表现出比原先的MF更好的减少摩擦和抗磨性能。这是因为MIL在滑动过程中参与摩擦化学反应，并形成由Dy ₂ O ₃，FeS，FeSO ₄组成的边界润滑膜，摩擦盘表面上的含氮有机物和硫醚，从而减少了摩擦副的摩擦和磨损。然而，尽管在高温下，MF可以形成由Fe ₃ O ₄和少量有机物组成的边界膜，但MF不能在25°C的摩擦钢表面上形成润滑膜。此外，在滑动区域中积聚的过量的Fe ₃ O ₄颗粒会导致滑动对的磨料磨损增加。