平行板电极喷射电沉积中的枝晶分形生长

Fractal Growth of Dendrites in Jet Electrodeposition with Parallel Plate Electrode

将分形几何引入到喷射电沉积,对枝晶生长动力学进行研究,以最终实现枝晶形态的可控生长.利用改进的有限扩散凝聚模型(DLA),通过Microsoft Visual C++6.0编程对平行板电极喷射电沉积二维枝晶簇的形貌进行了模拟.以平行板金属镍为阳极、石墨板为阴极,用自行设计的试验设备,采用平行板电极喷射电沉积的方法,制备了二维的金属镍枝晶以验证模拟结果.结果表明,镍沉积层的形貌特征为具有分形结构的枝晶,这与基于有限扩散凝聚模型模拟所得的平行板电极二维枝晶簇的形貌具有相似性,表明该模型对平行板电极喷射电沉积的试验研究具有很好的指导意义.

In this paper, the theory of fractal was introduced to investigate the dynamics of dendrite growth during jet electrodeposition and to further control the growth of dendrites. In the investigation, the modified diffusion-limited aggregation （DLA） model was adopted and the Microsoft Visual C ＋ ＋ 6.0 programming was performed to simu- late the morphology of the two-dimension dentrite cluster obtained by the jet electrodeposition with parallel plate electrode. Moreover, by using parallel Ni plate as the anode and graphite plate as the cathode, two-dimension Ni dendrites were manufactured by a self-designed jet electrodeposition system to verify the simulated results. It is found that the Ni dendrites possess the character of fractals and are similar to those simulated by the DLA model, meaning that the proposed model is helpful to the experimental investigation of jet electrodeposition with parallel plate electrode.