Patent ID: 7994105
Filing Date: 2011-08-09
Classification: C10M,C10N,Y10S

Abstract:
1. A lubricant comprising: hard nanoparticles having a size and hardness effective for embedding the hard nanoparticles in and work harden metal surfaces lubricated by the lubricant; and soft microparticles having layered structures and a size and composition effective for filling voids in the lubricated surfaces; wherein the hard nanoparticles and soft microparticles are dispersed in a hydrocarbon medium, the nanoparticles having an average particle size of about 20 to 40 nm are selected from alumina, silica, ceria, titania, diamond, cubic boron nitride, and molybdenum oxide and the microparticles are selected from graphite, hexagonal boron nitride, magnesium silicates (talc) and molybdenum disulphide.