Influence of the solubility range of intermetallic compounds on their growth behavior in hetero-junctions

•Study of relation thermodynamic properties, solubility and growth rate.•Method to estimate the solubility range of intermetallic phases with low solubility.•Applied to Cu3Sn and Cu6Sn5 phases in the Cu–Sn system. The solubility range has a large effect on the growth rate of intermetallic compounds...

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Bibliographic Details
Published in:Journal of alloys and compounds 2015-06, Vol.635, p.289-299
Main Authors: Guan, Y., Moelans, N.
Format: Article
Language:English
Subjects:
Alloys
Cu3Sn
Cu6Sn5
Diffusion coefficient
Estimates
Growth kinetics
Intermetallic compounds
Intermetallics
Phases
Simulation
Solubility
Thermodynamic properties
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Summary:•Study of relation thermodynamic properties, solubility and growth rate.•Method to estimate the solubility range of intermetallic phases with low solubility.•Applied to Cu3Sn and Cu6Sn5 phases in the Cu–Sn system. The solubility range has a large effect on the growth rate of intermetallic compounds (IMCs) formed at hetero-junctions, however, is extremely difficult to determine accurately experimentally. In this work, it is studied for IMCs with a narrow solubility range how the thermodynamic properties affect their solubility and growth rate in hetero-junctions. Furthermore, a method is developed to estimate the solubility range of IMCs based on phase-field simulations combined with experimentally measured diffusion coefficients and steady-state growth rate coefficients. Application of the method to the phases ε-Cu3Sn and η-Cu6Sn5 of the Cu–Sn system at 453K, gives the solubility ranges of the order of Δxε=2.0×10−2 and Δxη=2.6×10−2 using the experimental growth rates kε=4.40×10−9 and kη=7.76×10−9ms−0.5 (Onishi and Fujibuchi, 1975) together with the diffusion coefficients D∼ε=3.62×10−16 and D∼η=1.01×10−15m2s−1 (Mei et al., 1992), respectively.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2015.02.028