【摘要】 采用粉末冶金方法制备（Cu-10Sn）-Ni-MoS₂复合材料,研究镍包二硫化钼对复合材料显微组织、力学性能和摩擦学性能的影响。通过单独添加Ni和MoS₂的对比实验,分析Ni和MoS₂对复合材料性能影响的机理。结果表明,二硫化钼颗粒周围包裹的一层镍能有效减小二硫化钼和铜基体的反应速率,显著改善基体的结合情况。当镍包二硫化钼的质量分数为12%时（C12）,复合材料表现出优异的力学性能和摩擦学性能。C12复合材料在载荷为8 MPa、线速度为0.25 m/s及油润滑条件下的平均摩擦因数为0.0075;载荷为4 MPa、线速度为0.25 m/s及对偶材料40Cr干摩擦条件下的平均摩擦因数为0.1769。更多还原

【Abstract】 The（Cu-10 Sn）-Ni-MoS₂ composites, prepared by powder metallurgy, were studied for the effects of Ni-coated MoS₂ on the microstructure, mechanical properties and lubricating properties. The mechanism of effects of Ni and MoS₂ on the properties of composites was analyzed through a comparative experiment by adding Ni and MoS₂ separately. The results show that the nickel wrapping around the MoS₂ particles decreases the reaction rate of MoS₂ with the copper matrix, and greatly improves the bonding of the matrix. The composites with 12 wt.% Ni-coated MoS₂（C12） show the optimum performance including the mechanical properties and tribological behaviors. Under oil lubrication conditions, the friction coefficient is 0.0075 with a pressure of 8 MPa and a linear velocity of 0.25 m/s. The average dry friction coefficient, sliding against 40 Cr steel disc, is measured to be 0.1769 when the linear velocity and pressure are 0.25 m/s and 4 MPa, respectively.更多还原