Morphology and microstructure of electrodeposited Pb-Sn alloy

作者：Sun B^*; Zou XM; Jin ZZ

来源：Materials Science and Technology, 2004, 20(7): 864-868.

DOI：10.1179/026708304225017445

• lead tin alloys
• electrodeposition
• layered microstructure

Electrochemical deposition of Pb - Sn alloy with various compositions was conducted in a quasi-two-dimensional electrolysis cell. A series of crystal morphologies, including dendritic, branching, compacted, fractal and filamentous, appeared successively when the proportions of the two kinds of cations were varied. The morphological transition can be explained by the influence of the crystallographic microstructure. A single phase (pure metal or solid solution) in the texture of lead (or tin) dendrites induced a preferred orientation of growth. As the second component was increased, the texture of the deposit transformed into a pseudo-eutectic phase, which destroyed the preferred orientation of crystal growth and caused the formation of branches and a globular deposit. Additionally, an abnormal layered microstructure was observed in the deposits. The formation mechanism is discussed on the basis of electrochemical reaction dynamics.

• 出版日期2004-7
• 单位武汉大学