Abstract
Nanoparticle technology has a significant impact on the development of lubricants. However, there is a need to understand the influence of various parameters of base oil and nanomaterials individually as well as in combination. To understand the influence of base oil on lubrication properties of magnetic lubricant, identical nanoparticle material (magnetite nanoparticles-MNP) dispersed in two different base oils: synthetic oil and mineral oil having the same order of viscosities. The MNP concentration varied from 0 to 10 wt% in both oils and the lubrication properties studied using four ball tester. For synthetic oil, the minimum Coefficient of Friction (reduced by 45%) and Wear Scar Diameter (by 30%) obtained at 4 wt% of MNP compared to the base oil. In the case of mineral oil, COF decreased by 56% and WSD by 46% for 6 wt% of MNP. The surface characterization and lubrication mechanisms were studied using various microscopy techniques. The results explained using the difference in molecular structure as well as nanoparticle stability in both oils.
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