Friction and Wear Behavior of Carbide Derived Carbon Coating Sliding against Si₃N₄ under the Lubrication of Water

To elimainate the risk of failure due to the loss of water at the tribo-interface and overloading for SiC in water lubricated condition, the friction and wear of SiC and CDC coating under dry sliding and in water were investigated. CDC coating exhibited excellent tribological properties under dry sliding and in water. It was feasible to use CDC coating as a tribo-coating for case of the loss of water at the tribo-interface and overloading. A comparison on tribological behavior of CDC coating and commercial graphite was made on the basis of microstructure (carbon species, particle size, porosity). The effect of surface texture on CDC coating surface (induced by machining SiC) on the friction and wear was discussed.