化学镀Ni-P-石墨复合镀层的特性(英文)

与化学镀Ni-P镀层比较,化学镀Ni-P-石墨复合镀层的机械性能得到了改进,适合于工程方面的应用。Ni-P-石墨复合镀层是从含有硫酸镍、次磷酸镍、丁二酸、表面活性剂和稳定剂的镀液中制备的。当镀液中石墨含量为15g/L时,镀层中石墨的复合量最大。采用维氏硬度测试仪、泰伯磨耗实验机、交流阻抗和SEM等手段对复合了石墨颗粒的Ni-P化学镀层进行了测定,其硬度,耐磨、耐蚀性随镀层中石墨含量的增加而增强。

Effect of wear conditions on tribological properties of electrolessly-deposited Ni-P-Gr-SiC hybrid composite coating

The friction and wear properties of the electrolessly-deposited Ni-P-Gr-SiC composites were investigated. The effects of graphite content, load and rotation speed on the friction coefficient and wear resistance of the composite coatings were mainly investigated. The worn surface and cross section of the coatings were characterized by scanning electron microscopy and energy-dispersive X-ray analysis. The results show that the composite coatings reveal good antifriction and wear resistance due to the synergic effect of graphite and SiC particles. The formation of graphite-rich mechanically mixed layer （GRMML） on the surface of Ni-P-Gr-SiC coating contributes to the good tribological behavior of the wear counterparts and SiC particles play a load bearing role in protecting GRMML from shearing easily.