| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1642036 | Materials Letters | 2015 | 5 Pages |
•The electro-dissolution of second phase in Sn5Bi solder alloy was investigated.•The analysis through XRD and SEM shows evidence of electro-dissolution.•The dissolution kinetics of second phase was proposed under current stressing.
This study investigated the electro-dissolution, supersaturation and recrystallization of the second phase Bi in the Sn5Bi solder under 4.0×103–6.0×103 A/cm2 current stressing at 25 °C. The ex-situ XRD analysis of the current stressed specimen, after being quenched with liquid nitrogen, reveals a reduction of the Bi orientation peaks. The SEM investigation shows the dissolution and supersaturation of the Bi phase during current stressing. The in-situ SEM investigation reveals that recrystallization of the Bi phase occurred in the unquenched specimen when the current stopped. The kinetics of the electro-dissolution were analyzed, and the results showed that the maximum dissolution rate occurred during the progress of current stressing.
