ZrO2微粒与基质金属及溶液间相互作用的研究

介绍了Ni-ZrO2复合镀工艺配方。通过镀液中ZrO2微粒的Zeta电位分析以及ZrO2微粒质量浓度对镀液pH的影响研究，探讨了微粒与镀液间的相互作用。分别通过纯镍镀层和Ni-ZrO2复合镀层的X-射线衍射实验及SEM形貌分析，研究了微粒与基质金属间的相互作用。结果表明，镀液中的pH随着ZrO2质量浓度的增加而增大；ZrO2微粒因吸附镀液中的H^＋而带正电，有益于其阴极扩散，从而增加镀层中粉体的含量；ZrO2微粒与基质金属间不是简单的机械混合，而是存在相互作用。而且，它的存在改变了基质金属镍的择优取向，也细化了金属镍的晶粒。

Study on the interaction of the ZrO2 particle with substrate metal and bath

The process formula of Ni-ZrO_2 composite plating was introduced.Interaction of ZrO_2 particle with bath was investigated by analysis of Zeta potential of particle of ZrO_2 in the bath and studying the influences of the mass concentration of ZrO_2 particle on pH value of bath.The interaction of particle with substrate was studied by X-ray diffraction test and analysis of SEM morphology of pure nickel deposit and Ni-ZrO_2 composite deposit respectively.Results show that pH value is increased with increasing mass concentration of ZrO_2 particle;ZrO_2 is positively charged because of the adsorption of H~+.Therefore,it is beneficial to cathode pervasion and increasing content of powder in coating.The interaction exists between ZrO_2 particle and substrate and it is not simple mechanical mixing between them.The existence of ZrO_2 particle changes the preferential orientation of substrate metal nickel and nickel particle becomes fine-grained accordingly.