温度对金属镍电沉积中枝晶分形生长的影响

Effects of Temperature on fractal Growth of Dendritic Crystals in Nickel Electrodeposition

将分形几何与电化学原理相结合,通过改进的有限扩散凝聚模型(diffusion-limited aggregation,DLA),采用基于Microsoft Visual C++6.0编程,模拟温度对点电极电沉积结果的影响。以环形金属镍为阳极,石墨为阴极,用自行设计的试验设备研究了不同温度时金属镍二维电沉积生长的行为特性,并与模拟结果进行比较。结果表明:在保持电压恒定的条件下,温度对点电极电沉积的影响与采用DLA模型模拟所得的结果具有相似性,表明利用DLA模型模拟的结果对枝晶电沉积的试验研究具有很好的指导意义。

The impact of temperature variation on the results of electrodeposition at point electrode was stimulated through a combination of fractals and electrochemical principle, by modified DLA model, and based on Microsoft Visual C ＋＋ 6.0. Using Ni ring as anode and graphite as cathode, the behaviours of two-dimensional electrodeposition of metal nickel at different temperatures were investigated with self-designed experimental equipment, and also compared with the simulated results. The results show that under constant voltage, the impact of temperature variation on electrodeposition at point electrode is similar to the results stimulated with DLA model. It would he helpful to use the stimulation by DLA model to direct the experiment of dendritic crystal electrodeposition.