THERMODYNAMICS-AIDED ALLOY DESIGN AND EVALUATION OF Pb-FREE SOLDER, Sn-Bi-In-Zn SYSTEM

摘要

To design Pb-free solder alloys which are drop-in replacements for 63Sn-37Pb (compositions are all in weight percent, otherwise specified), thermodynamic studies on the Sn-Bi-In-Zn quaternary system were carried out in terms of phase equilibria. Based on the results of phase equilibria calculations, several specific alloy compositions were selected and analyzed using differential scanning calorimetry (DSC) measurements. DSC results were compared with thermodynamically calculated phase transition and melting temperatures.