Preparation Of Carbide Or Nitride-based Coatings And Their Tribological And Corrosive Properties In Water

In this paper, the TiCN film, Ti-DLC film and Ti/TiN film were deposited on316L stainless steel,M2tool steel and Si substrates using unbalanced magnetron sputtering system and DC magnetronsputtering system. These films’ composition, hardness, elasticity modulus, corrosion resistance,water-lubricated friction and wear properties, wear track on the ground surface and three-dimensionalsurface of the films and grinding ball wear scar were measured and observed using X-ray diffraction,nano-indenter, hardness tester, electrochemical workstation, ball-on-disc wear testing machine,scanning electron microscopy with EDS, three-dimensional morphology, and optical microscope,respectively.The preparation process parameters of Ti/TiN film were optimized. It showed that the Ti filmdeposition parameters were the power of200W, argon gas flow7sccm. The TiN film’s optimalexperimental parameters were gas flow ratio2:8(Ar:N2), deposited power100W, negative bias60V,duty cycle80%. The Ti/TiN films were deposited at the optimal parameters, and compared with that ofStar-arc Co.Ltd in water lubricated. It is found that although the Ti/TiN film made in our laboratory canreduce the wear rate of the grinding ball, but it soon failed. For the influence of substrates on thetribological properties of TiCN films in water lubrication, it is clear that the M2tool steel substratecould increase the friction coefficient and the films wear rate, but the ball wear rate decreased, while at3N and0.4m/s, the TiCN films on316L stainless steel substrate can get the lowest friction coefficientof0.179. As compared to TiN film, the TiCN film has a lower corrosion current and higher corrosionpotential, so the corrosion resistance increased. During the Ti-DLC film’s water-lubricated test, thesubstrate M2tool steel can decreases the friction coefficient and greatly reduces film wear rate. At9Nand0.4m/s, the Ti-DLC on316L stainless steel substrate can achieve the lowest friction coefficient of0.034. As compared to the DLC films, Ti-DLC films have little difference corrosion potential, but thecorrosion current increases, so the corrosion resistance reduced.