Abstract
The selection and evaluation of Pb-free solders requires information that is best determined through a knowledge of ternary and higher order phase diagrams. As part of an ongoing program on Pb-free solder phase diagrams at the National Institute of Standards and Technology, a thermodynamic model is formulated for the Sn-Bi-Ag phase diagram. Thermodynamic functions for the various phases obtained by fitting measured data for the three constituent binary systems are extrapolated to the ternary system using the method of Muggianu. Modeling results are compared to preliminary experimental data for the ternary system and are applied in the calculation of the solidification path.
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Kattner, U.r., Boettinger, W.J. On the Sn-Bi-Ag ternary phase diagram. J. Electron. Mater. 23, 603–610 (1994). https://doi.org/10.1007/BF02653345
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DOI: https://doi.org/10.1007/BF02653345