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Phase-field modeling for electrodeposition process

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Author(s): Yasushi Shibuta, Yoshinao Okajima and Toshio Suzuki

Journal: Science and Technology of Advanced Materials
ISSN 1468-6996

Volume: 8;
Issue: 6;
Start page: 511;
Date: 2007;
Original page

ABSTRACT
A novel phase-field model for electrochemical processes, in which cations were driven by an electrostatic potential coupled with a thermodynamic potential, was formulated from a variation of the Ginzburg–Landau free-energy functional. Using this model, an electrodeposition process of copper deposits from copper-sulfate solution was studied using a phase-field simulation. The dependence of the growth velocity of the electrode on the applied voltage was examined in a one-dimensional system. Then, the morphological transition of the electrodeposits as functions of the applied voltage and the composition ratio of copper ion in electrolyte was examined using a two-dimensional system. Thin and dense branches were observed at a low applied voltage. The shape of the branches became more complicated as the composition ratio was lowered.
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