Randomized trial evaluates tribological performance of iron-based composites reinforced with lubricants, indicating improved friction reduction.
Key Points
This research aims to investigate the effects of graphite and graphene oxide on the properties of iron-based self-lubricating composites.
Three composite formulations (Fe10%Gr, Fe10%GO, Fe5%Gr5%GO) were fabricated using powder metallurgy techniques.
Composites were analyzed for densification, hardness, and friction performance through pin-on-disk tests.
The powders were compacted at 500 MPa and sintered at 880 °C under an argon atmosphere.
Pure Fe had the highest hardness (approximately 97 HV) but showed a higher coefficient of friction (~0.33) compared to lubricant-containing composites.
Fe10%Gr and Fe5%Gr5%GO had significantly lower friction coefficients of ~0.08 and ~0.05, respectively.
Fe5%Gr5%GO achieved the best friction-wear balance with low friction and moderate wear rates.