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Oil-soluble Nano-Cu lubricating additive was prepared and its tribology behaviors as lubricant additive in SJ 15W/40 heavy duty gear oil used for aluminum alloy material ZL101 were investigated on an end-face friction and wear tester apparatus. SEM and EDS techniques were used to characterize the morphology, compositions and chemical states of the worn surface. The results indicate that the oil-soluble Nano-Cu additive have excellent friction-reducing properties and 0.6wt.% addition exhibited the best friction behavior. An appropriate applied load and rotating speed can improve the tribology properties obviously. The combination of SEM-EDS analysis reveals that by addition of Cu nanoparticles, a tribo-film containing Cu nanoparticles was formed and helped improving the wear and friction properties. The results demonstrate that Cu nanoparticles are potential friction modifier when used in ZL101.

Investigation on Tribology Behaviors of Oil-soluble Nano-Cu Lubricating Additive for Aluminum Alloy ZL101