Influence of Boron Nitride on Tribological Behavior of Nickel-Base Composite Coatings at High Temperature
The nickel-based boron nitride composite coatings were prepared by reversing pulse electro-deposition. The mechanical properties and friction behavior of the coatings at high temperature were tested by using Al2O3 ceramic ball at high temperature friction-testing machine. The results show that the surface micro-hardness of the coatings increases with the addition of BN powder. Meanwhile, the friction coefficient and wear rate of specimens decreases. Especially when the BN addition is 1.5g/L the composite coatings present a minimum of friction coefficient and wear rate. In optimum process parameters, the friction coefficient of the coatings is about 0.2 at room temperature and 0.4-0.5 at 600°C. In addition, the friction and wear properties were significantly improved by plating Ni transition layer plated between substrate and composite coating.
Yafang Han, Fusheng Pan, Jianmao Tang, Chungen Zhou
Y. K. Zhang et al., "Influence of Boron Nitride on Tribological Behavior of Nickel-Base Composite Coatings at High Temperature", Materials Science Forum, Vol. 686, pp. 711-715, 2011