Abstract
Graphene is considered a good lubricant additive. The lubricating properties of graphene lubricant at different concentrations and temperatures are studied via a four-ball friction and wear-testing machine. The results show that the coefficient of friction (COF) and wear scar diameter (WSD) of the steel ball with 0.035 wt% graphene lubricant decreased by 40.8% and 50.4%, respectively. Finally, through surface analysis, the following lubrication mechanism is proposed: as the added graphene particles can easily fill and cover the pores of the friction surface, the contact pressure of the rough peak is reduced, resulting in a lower COF and smoother surface. Although the COF increases with temperature, graphene lubricants still exhibit good lubrication effects.
Original language | English |
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Article number | 506 |
Journal | Lubricants |
Volume | 11 |
Issue number | 12 |
DOIs | |
Publication status | Published - Dec 2023 |
Keywords
- friction and wear properties
- graphene lubricant
- lubrication characteristics
- roughness