Influence of graphene as additive in soybean oil (original) (raw)

IOP Conference Series: Materials Science and Engineering

Anti-wear additives and friction additives are used for medium stresses and the protective film relies heavily on adsorption processes and regeneration of the protective film. This study presents the influence of graphene concentration as additive in soybean oil and test regime (load and speed) on tribological characteristic (friction coefficient and wear rate of the balls used in a four-ball test). A general view of the results, easy to see by the plotted maps of the average value for friction coefficient depending on load and additive concentration and of wear rate of the scar diameter, reveals that the wear rate is almost non-sensitive to the test parameters and this zone is limited by F = 200 ...300 N, for all the sliding speeds. As for the friction coefficient, the additivation does not lower this tribological parameter in a spectacular way for the additivated lubricants. These results encourage to use the additive for tribosystems that function with variable load and speed, but in the ranges as the tests done by the authors.

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