Alloying effects on the phase stability and mechanical properties of doped Cu-Sn IMCs: a first-principle study

Zhang, Yong, Yuan, Ding-Wang, Chen, Jiang-Hua, Zeng, Guang, Fan, Tou-Wen, Liu, Zi-Ran, Wu, Cui-Land and Liu, Ling-Hong (2016) Alloying effects on the phase stability and mechanical properties of doped Cu-Sn IMCs: a first-principle study. Journal of Electronic Materials, 45 8: 4018-4027. doi:10.1007/s11664-016-4605-3


Author Zhang, Yong
Yuan, Ding-Wang
Chen, Jiang-Hua
Zeng, Guang
Fan, Tou-Wen
Liu, Zi-Ran
Wu, Cui-Land
Liu, Ling-Hong
Title Alloying effects on the phase stability and mechanical properties of doped Cu-Sn IMCs: a first-principle study
Journal name Journal of Electronic Materials   Check publisher's open access policy
ISSN 0361-5235
1543-186X
Publication date 2016-08
Year available 2016
Sub-type Article (original research)
DOI 10.1007/s11664-016-4605-3
Open Access Status Not Open Access
Volume 45
Issue 8
Start page 4018
End page 4027
Total pages 10
Place of publication New York, NY, United States
Publisher Springer New York LLC
Collection year 2017
Language eng
Formatted abstract
Cu-Sn phases are important intermetallic compounds formed at the interface between solder and substrate in the soldering process. They exist in several crystal structures (η′, η, η1 and η2, etc.). The solid-state phase transformation that occurs among Cu-Sn intermetallic compounds is a crucial issue for industry applications, because the associated volume change inevitably leads to microstructural instability. Generally, four alloying elements, i.e., Ni, Au, Zn, and indium (In), are used as alloying elements to stabilize the high temperature hexagonal η-phase. However, the physical mechanism of this stabilization effect, especially on the high temperature η1 and η2 phases, is still unclear. In the present study, first-principle calculations were performed to study the stability and mechanical properties of Cu5Sn4 (η1 and η2) and Cu6Sn5 (η′) when doped with Ni, Au, Zn, and indium alloying elements. It is shown that their phase stability and mechanical properties could be enhanced by these elements in some circumstances. Ni-doping can significantly enhance both the stability and the mechanical properties of the three phases, whereas Zn-doping exhibits a significant effect on that of the η2 phase
Keyword Alloying effects
First-principle calculations
Intermetallic compounds
Mechanical properties
Phase stability
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
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