implicit (MPS) method. The improved MPS code was applied to three-dimensional Pb–Sn
system experiments conducted at Central Research Institute of Electric Power Industry
(CRIEPI). The experiments dealt with solid–solid contact materials at 225 and 205° C. The
mass diffusion process was modeled based on Fick's second law. The criterion of eutectic
reaction was modeled based on binary phase diagram. The calculated penetration rates, ie …