Microstructural Characterization and Properties of Sn-Ag-Cu (SAC) Compound Induced by Zn Alloying
The microstructural properties and intermetallic (IMC) formation of Sn-Ag-Cu (SAC) through varying amounts of zinc were examined in this study while having tin held at constant composition. Samples were prepared and heated in a furnace for 168 hours to achieve complete solidification and homogenization. Results showed relatively fine microstructure primarily containing Sn dendrites, eutectic, and pro-eutectic phases. Microstructures for each alloy was similar for which majority of them formed copper-based IMCs and Sn dendrites. The alloy (0.7Sn-0.15Ag-0.1Cu-0.05Zn) containing minimal amount of zinc with high amount of Ag resulted to high Vickers hardness number. Structural analysis showed that these group of alloys composed mainly of β-Sn, Cu6Sn5, and Ag3Sn.
Prof. Ramesh K. Agarwal
S. M. Go Roa et al., "Microstructural Characterization and Properties of Sn-Ag-Cu (SAC) Compound Induced by Zn Alloying", Nano Hybrids and Composites, Vol. 16, pp. 33-36, 2017