Tribological Properties of Nano-MMT/In Lubricant Additive on Steel-bronze Tribo-pair

In order to obtain the tribological properties of nano-montmorillonite (MMT)/In lubricant additive on steel-bronze tribo-pair. 1:1 MMT/In composite nano-powders were prepared by nano-MMT and nano-In modified with coupling agent KH550, and the nano-MMT/In lubricating oil dispersion system was prepared by 150 N base opl containing 3 mass fraction of nano-MMT/In composite powders, and then took the dispersion effect by TEM. The anti-wear and friction-reducing behaviors of that lubricating oil dispersion system were observed on the MMU-10G abrasive-wear tester with steel-bronze tribo-pair, the morphology and the element of the worn surfaces were analyzed by SEM and EDX. The results showed that the modified nano-MMT/In had the good dispersion in the system; compare with the one in base oil system, the average friction coefficient of sample of steel-bronze tribo-pair in nano-MMT/In additive lubricating oil system had declined by 22.65 %, and the total wear mass loss had declined by 47.62 %; The surface of sample after friction had created the selfrepairing film that contain the characteristic element of MMT and In, that phenomenon was caused by the interaction of nano-MMT and nano-In.