The synergetic lubricating effect between CuMoO4 and oxide lubrication (such as MoO3, Cr2O3, CuO, and NiO) is the principal reason for the anti-wear and self-lubricate of the composite coatings.
The improvement of lubrication performances should be ascribed to the synergistic lubricating effect of the hybrid nanoparticles during sliding.
Furthermore, the friction coefficient decreased further when subjected to deionized water lubrication and high sliding speed because of the secondary lubricating effect.
The solid lubricants embedded in the micro-dimples can provide a second lubricating effect, thus realizing a low-friction coefficient (0.15) for a long time.
Even so-called social smokers, the ones who only light up bummed cigarettes when they are out drinking, say they will miss the lubricating effect that smoking has on social interaction.
Hyaluronic acid (HA) provides synovial fluid viscoelasticity and has a lubricating effect.
On one hand, water has a lubricating effect that modifies the contact surface stress and friction during the test.
The excellent lubricating performances of SiO2/MoS2 (0.25:0.75) hybrid nanofluids indicate that the synergistic lubricating effect of nano-SiO2 and nano-MoS2 are closely related to the mixing ratio of SiO2 to MoS2 in the base oil.
The results showed that MWCNTs and graphene present the different nano-scale tribological mechanisms and produce different lubricating effect on the hybrid films at different lubricating states.
The lubricating effect is based on the formation of vanadium oxides with weakly bonded lattice planes and low melting temperature.
