Abstract
Early studies of Ag-Sn and Cu-Sn binary alloys showed very low values, 0.04 wt.% for Ag and 0.0063 wt.% for Cu, for the solid solubility of these elements in Sn at the eutectic temperature. In recent work on “as-cast” Sn-Ag-Cu solder alloys, much higher values have been reported for the Ag and Cu content of the Sn phase. In the present study, wavelength dispersive x-ray microprobe measurements made on a near-equilibrium sample confirmed the earlier solubility values. It was concluded that higher values, some of which are reported in the current paper, represent nonequilibrium, supersaturated solid solutions.
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Snugovsky, L., Cermignani, C., Perovic, D.D. et al. The solid solubility of Ag and Cu in the Sn phase of eutectic and near-eutectic Sn-Ag-Cu solder alloys. J. Electron. Mater. 33, 1313–1315 (2004). https://doi.org/10.1007/s11664-004-0159-x
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DOI: https://doi.org/10.1007/s11664-004-0159-x