Effects of magnetic arrayed films on lubrication transition properties of magnetic fluid

In this paper, a kind of surface covered with magnetic arrayed film (MAF) was fabricated for magnetic fluid lubrication. The lubrication properties of magnetic fluid on the magnetic surface were investigated using a ring-on-disk tester. Much attention was paid to the effects of magnetic film thickness and area density on the lubrication properties. The results showed that the presence of MAF shifts the transition from mixed to hydrodynamic lubrication to higher ratio of speed/load. In addition, the surface with MAF presents friction reduction at higher sliding speed. Furthermore, the optimized magnetic surface reveals a positive effect on wear resistance.