Characterization and auto-restoration mechanism of nanoscale serpentine powder as lubricating oil additive under high temperature

Friction and wear experiments were carried out with nanoscale serpentine (a magnesium silicate mineral) and heat-treated serpentine as lubricating oil additives at 400 °C. The tribological test results showed that the self-repairing protective layers could be well formed on the contact surfaces, whether nanoscale serpentine or heat-treated serpentine powder was added into lubricating oil. SEM and EDAX analysis demonstrate that the morphology and...