Quasi-two-dimensional electrodeposition growth of Pb0.5Sn0.5 alloy by Bin Sun, Xian-Wu Zou, Zhi-Jie Tan, and Zhun-Zhi Jin

Crystal Research and Technology

Cryst. Res. Technol. 41, 437 (2006) - Abstract -

Quasi-two-dimensional electrodeposition growth of Pb_0.5Sn_0.5 alloy

Bin Sun, Xian-Wu Zou, Zhi-Jie Tan, and Zhun-Zhi Jin

Department of Physics, Wuhan University, Wuhan 430072, China

Keywords	electrodeposition, microstructure, Pb-Sn alloy
PACS	82.45.Qr, 61.72.-y, 61.66.Dk
DOI	10.1002/crat.200510602

Electrodeposition of Pb_0.5Sn_0.5 alloy is carried out in a quasi-2D electrochemical cell. As the growth proceeds the morphologies of the deposits transit from cake-like to branched and finally to the compact morphology. We show that these morphological transitions arise from the changes in the transport mechanisms of the ions in the electrolyte cell. In addition, it is found that the current density on the growth interface can vary spontaneously due to the irregular shape of the deposit and the generation of hydrogen gas. It causes the formation of the complex microstructure with non-uniform composition.

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