Morphological Change in Multi-layered 2D-dendritic Growth of Silver-substitution Plating under Vertical Gravity Field

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  • SATO Makoto
    Polytechnic Center Aizu Departinent of Chemistry, Nagaoka University of Technology
  • OSHIKIRI Yoshinobu
    Department of Environmental Engineering Yamagata College of Industry & Technology Departinent of Chemistry, Nagaoka University of Technology
  • YAMADA Akifumi
    Departinent of Chemistry, Nagaoka University of Technology
  • AOGAKI Ryoichi
    Department of Product Design, Polytechnic University

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<p>Under vertical high gravity field, multi-layered two-dimensional (2D)-dendritic growth of silver-substitution plating was examined. As a result, in the vertical gravity fields up to 145 G, it was clarified that: 1) when the electrode is set in upward-horizontal mode, the dendritic growth is greatly suppressed by increasing gravitational acceleration, yielding a high-density-dendrite layer, 2) such high-density layer is self-organized on the electrode surface together with gravitational-convection cells, and in front of the high-density layer, a low-density layer is formed. 3) when the electrode surface is oriented downward horizontally, suppression of the deposit is hardly observed; a conventional low-density-dendrite layer grows, and 4) when the gravitational acceleration changing with time is applied, a characteristic dendrite layer is observed, which is alternatively stacked by high-density and low-density layers. These results were ascribed to the fact that the convection cells induced by the hydrodynamic instability in a vertical gravity field interact with nonequilibrium fluctuations accompanying dendritic growth.</p>

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  • Electrochemistry

    Electrochemistry 73 (1), 44-53, 2005-01-05

    公益社団法人　電気化学会

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