Tribological and tribochemical properties of magnetite nanoflakes as additives in oil lubricants

- Friction coefficient with base oil of 1.5 wt% Fe3O4 nanoflakes decreased by 18.06%.
- After 48-h friction, chemical composition of the base oil did not change.
- During friction, Fe3O4 particle size decreased due to lattice distortion.
- Formation of tribochemical film on friction surface may improve the friction properties.