化学复合镀Ni-P-金刚石的耐磨性研究

A Study of Wear-Resistance of Electroless Ni-P-Diamond Composite Coating

研究了金刚石和还原剂的质量浓度对镁合金Ni-P-金刚石复合镀层成分及耐磨性的影响。结果表明:镀层中金刚石的质量分数随镀液中金刚石的质量浓度的增加而增加,镀层中磷的质量分数随镀液中还原剂的质量浓度的增加而增加;随镀液中金刚石的质量浓度的增加,磨损量呈先降低后升高的趋势,当其质量浓度为8 g/L时,耐磨性最好;另外,随着镀液中还原剂的质量浓度的增加,磨损量也会增大。镀层中金刚石分布均匀,当磷的质量分数为5%时,镀态下镀层为非晶+微晶结构。

The effects of the mass concentration of diamond and reducing agents on the composition and wear-resistance of electroless Ni-P-diamond composite coating were studied.The results show that the mass fraction of diamond in the coating increases as the mass concentration of diamond in the bath increases;the mass fraction of phosphorus in the coating increases along with the increasing of the mass concentration of reducing agent in the bath.As the mass concentration of diamond in the bath increases,wear amount decreases at first,and then increases,and the wear resistance is the best when its mass concentration is 8 g/L.In addition,as the mass concentration of reducing agent in the bath increases,wear amount will increase too.Diamond distributes uniformly in the coating,and when the mass fraction of phosphorus is 5.00 %,the as plated coating is of an amorphous plus microcrystalline structure.