用于化学复合镀的Ni_(3.1)B非晶态纳米合金粉体的制备

Preparation of Ni3. 1B Amorphous Nano Alloy Particles for Electroless Composite Plating

利用化学还原法,以硼氢化钾为还原剂,制备了Ni3.1B非晶态纳米合金粉末,用于化学镀(Ni-P)-Ni3.1B合金镀层。通过对还原剂硼氢化钾、稳定剂硫脲和表面活性剂聚乙烯吡咯烷酮对Ni3.1B纳米合金粉末的粒径的影响,确定化学还原法制备Ni3.1B的最佳条件为0.02 mol/L NiCl2.6H2O,0.06 g/L KBH4,2mg/L硫脲,0.25g/L聚乙烯吡咯烷酮。通过对Ni3.1B粉体分散性和在化学镀Ni-P-B合金镀液中的稳定性的研究,发现海藻酸钠对Ni3.1B具有良好的包覆效果。

Ni3.1B amorphous nano alloy particles used for electroless （1＇~^-t＇）-1~13.~ composite pl^L,,,~ were prepared by chemical reducing method with borohydride （ KBH4 ） as reducing agent. After investigted the effect of KBH4 ,thiourea and PVP concentration on the size of Ni3.tB particle,the optimized prepara- tion conditions were obtained as 0.02 mol/L NiCI： ·6H2O,0.06 g/L KBH4,2 mg/L thiourea and 0.25 g/L PVP. By analyzing the dispersity and stability of Ni3. 1 B particle in the Ni-P-B electrolyte, it was found that sodium alginate has a better coating effect to Ni3. 1B particle.