Effects of BN and MoS₂ on friction and wear properties of nickel-based materials

The nickel-based materials added with the different solid lubrications in the mass fraction as 0%, 10%MoS₂, 5%MoS₂+5%BN, and 10%BN were prepared by hot press sintering, respectively. The friction and wear properties of nickel-based composites were tested by pin disc friction and wear testing machine at the load of 30~60 N in the sliding speed of 0.35~0.58 m·s^-1 (300~500 r·m^-1), the wear surface morphology of Ni-based materials were observed by scanning electron microscopy (SEM), and the effects of different solid lubrications on the wear resistance of nickel-based materials were studied. The experimental results indicate that, the nickel-based composites with 10%MoS₂ show the lower and stable friction coefficients and the lowest wear rates due to the good combination between MoS₂ and matrix; however, the composites with 10%BN show the relatively high friction coefficients and wear rates under high load and sliding rate due to the loose combination between BN and matrix.