An efficient lubrication approach to mitigate soot-induced wear: Synergistic repair effect of magnetic MoS2 composites and magnetic field

Abstract Given an incomplete combustion of fuel, soot particles commonly exist in the engine lubrication system and are detrimental to the normal operation of the lubrication system. A new method to suppress the effect of soot particles was proposed in the present study. Magnetic MoS2 (M − MoS2) composite was prepared, and its tribological performance in polyalphaolefin (PAO) 6 mixed with biodiesel soot (BDS) particles were investigated. Furthermore, the tribological behavior of M − MoS2 in PAO 6 containing BDS with and without magnetic field were compared. The test results showed that the adding M − MoS2 alone was ineffective in reducing the soot-induced wear, whereas the wear was significantly reduced after applying an external magnetic field. The synergistic repair mechanism of M − MoS2 composites and a magnetic field on mitigating wear caused by BDS was analyzed by employing a series of surface characterizations.