金刚石表面电镀镍铁合金工艺研究

在金刚石表面镀一层均匀的镍铁合金镀层,以增强金刚石颗粒的物理化学性能.重点介绍了在金刚石颗粒上实现高质量镍铁合金镀层需要注意的一些问题.设计一种改进的滚镀装置,解决了传统金刚石电镀装置的弊病.在金刚石表面化学镀一层很薄的金属镍,然后利用滚镀装置并严格控制一定的工艺,在60～70目的金刚石颗粒表面获得了一层镀层均匀、厚度达10～200μm、含铁量在20%～25%的高硬度镍铁合金.试验的关键因素是要控制好温度、pH值、电流密度以及防止铁阳极污染镀液.

Electrodeposition of Ni and Fe Alloy on Diamond Grains

To improve the quality of diamond grain, a even alloy film of Ni and Fe was plated on diamond grain. Some problems about high quality alloy film of Ni and Fe was discussed. A improved plating facility was designed , which solve the disadvantage of the traditional facility for electrodepositing diamond. Firstly a very thin coating of Ni was plated on diamond grain. Then a even alloy film was achieved by the plating facility under some techniques controlled strictly. Fe content of the film is 200-/o -250-/o and the thickness is lOym t0 200ym. The key factor of this experiment is that temperature, pH value and current density should be control well. Moreover, Fe anode should be prevented from polluting the plating solution.