Abstract
Diamond nanoparticles synthesized by the detonation of explosives were used as an additive in paraffin oil. The tribological properties of the two-phase lubricant of paraffin oil and diamond nanoparticles were investigated. The results show that, under boundary lubricating conditions, this kind of two-phase lubricant possesses excellent load-carrying capacity, anti-wear and friction-reduction properties. The ball-bearing effect of diamond nanoparticles existed between the rubbing faces, the surface polishing and the increase in surface hardness effects of the diamond nanoparticles are the main reasons for the reduction in wear and friction.