Formation Mechanism of Phase Interface for Diffusion Couple of Pb/Sn Layered Composite

Formation Mechanism of Phase Interface for Diffusion Couple of Pb/Sn Layered Composite

Zhaohui Han Xiaohua Yu Peixian Zhu Shenggang Zhou* Yi Yang

College of metallurgy and energy engineering, Kunming University of Science and Technology, Kunming 650093,China

College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093,China

Hubei Zhonggong Equipment Industry Investment Co. Ltd., Macheng, 430000, China

Corresponding Author Email: 
15987187676@163.com
Page: 
83-87
|
DOI: 
https://doi.org/10.14447/jnmes.v20i2.303
Received: 
21 January 2017
| |
Accepted: 
27 March 2017
| | Citation
Abstract: 

This paper prepares the diffusion couple of Pb/Sn layered composite by hot pressing, treat it at different holding times, and investigates the appearance characteristics and forming mechanism of the couple by means of SEM-EDS. The results show that Sn atoms preferentially diffuse into the Pb side under the heating temperature of 503K and the pressure of 0.5MPa. With the increase of the welding time, a eutectic liquid layer is formed on the interface of Pb/Sn and the diffusion-dissolution of Pb and Sn atoms are completed by simulta-neous extension and homogenization. The research also demonstrates the star studded distribution of α-Pb and β-Sn solid solutions.

Keywords: 

diffusive coupled-phase of Pb/Sn layered composite, diffusion-solution layer, enthalpy of formation, layered anode material

1. Introduction
2. Experimental Procedures
3. Results and Discussion
4. Conclusion
5. Acknowledgment
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