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Preparation and characterization of monosized Cu–Sn spherical alloy particles by pulsated orifice ejection method

Published online by Cambridge University Press:  21 June 2018

Ying-yan Hu*
Affiliation:
School of Engineering and Technology, China University of Geosciences, Beijing 100083, China; and National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
Wen Yue
Affiliation:
School of Engineering and Technology, China University of Geosciences, Beijing 100083, China
Jian-qiang Li*
Affiliation:
National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; and School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Wei Dong
Affiliation:
School of Material Science and Engineering, Dalian University of Technology, Dalian 116024, China
Can Li
Affiliation:
National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; and School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Bing-qian Ma
Affiliation:
National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
Chao Liu
Affiliation:
School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Jian-jun Han
Affiliation:
School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
*
a)Address all correspondence to these authors. e-mail: 313420145@qq.com
b)e-mail: jqli@ipe.ac.cn
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Abstract

Monosized spherical Cu–20% Sn (wt%) alloy particles with diameter ranging from 70.6 to 334.0 μm were prepared by the pulsated orifice ejection method (termed “POEM”). Fully dense without pores and bulk inclusions, the cross-sectional micrographs of the spherical alloy particles indicate an even distribution of Cu and Sn. These spherical Cu–Sn alloy particles exhibit a good spherical shape and a narrow size distribution, suggesting that the liquid Cu–Sn alloy can completely break the balance between the surface tension and the liquid static pressure in the crucible micropores and accurately control the volume of the droplets. Furthermore, the cooling rate of spherical Cu–20% Sn alloy particles is estimated by a Newton’s cooling model. The cooling rate of the Cu–20% Sn alloy particle decreases gradually with the particle diameter increasing. Smaller particles have higher cooling rates and when the particle diameter is less than 70 μm, the cooling rate of particles can reach more than 3.3 × 104 K/s. The secondary dendrite arm spacing has strong dependence on particle diameter which increases gradually with the increase of particle diameter. The results demonstrate that POEM is an effective route for fabrication of high-quality monosized Cu–20% Sn alloy particles.

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Article
Copyright
Copyright © Materials Research Society 2018 

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References

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