【摘要】 在化学镀镍过程中共沉积纳米二硫化钨（WS₂）和六方氮化硼（h-BN）颗粒，制备了Ni–P–BN（h）–WS₂复合镀层，并在400℃保护气氛中热处理1 h。利用扫描电子显微镜、X射线衍射仪、摩擦磨损试验机等对镀层的成分、微观结构及摩擦学性能进行了表征。结果表明，随着镀液中WS₂用量的增加，镀态镀层中WS₂的含量几乎线性上升，BN的含量则先增大而后逐渐减小，表面胞状结构有变粗趋势，镀态镀层的显微硬度由620 HV降至480 HV，与Si3N4陶瓷球之间的摩擦因数由2.27降至1.92，耐磨性呈现先降后升的趋势。400℃热处理后，镀层发生晶化而析出Ni和Ni3P结晶相。随着镀液中WS₂含量的增加，镀层的显微硬度由868 HV降至687 HV，与陶瓷球的摩擦因数从1.90降至1.18，耐磨性与镀态相比显著提高。镀液中WS₂含量为2.5 g/L的复合镀层热处理后拥有低的摩擦因数和磨损率，综合摩擦学性能好。更多还原

【Abstract】 Ni–P–BN（h）–WS₂ composite coatings were prepared by electroless nickel plating with co-deposition of tungsten disulfide（WS₂） and hexagonal boron nitride（h-BN） nanoparticles, and then heat-treated at 400 ℃ for 1 hour in an inert atmosphere. The composition, microstructure, and tribological properties of the coatings were characterized by using scanning electron microscope, X-ray diffractometer, as well as friction and wear testing machine. The results showed that with the increasing of WS₂ dosage in the plating bath, the content of WS₂ in the as-plated coating was increased almost linearly, while the content of BN was increased initially and then decreased gradually, the cellular structure of the as-plated coating surface became coarser, the microhardness of the as-plated coating was decreased from 620 HV to 480 HV, the friction factor between the as-plated coating and Si3N4 ball was decreased from 2.27 to 1.92, and the wear resistance of the as-plated coating was weakened initially and then improved. During heat treatment at 400 ℃, the coating crystallized and some crystalline phases such as Ni and Ni3P were precipitated. With the increasing of WS₂ dosage in the plating bath, the microhardness of the heat-treated coating was decreased from 868 HV to 687 HV, and the friction factor of the heat-treated coating against Si3N4 ball was decreased from 1.90 to 1.18. The wear resistance of the composite coating was greatly improved by heat treatment. The composite coatings prepared with 2.0 g/L or 2.5 g/L of WS₂ in the plating bath after heat treatment exhibited good comprehensive tribological properties with low friction factor and low wear rate.更多还原