Phase equilibria, phase formation and solidification microstructure in Sm-Fe-Ti alloys via experimental determination and thermodynamic calculation

Phase equilibria in the Sm-Fe-Ti system at 873 and 1073 K as well as solidification microstructure of several Sm-Fe-Ti as-cast alloys were investigated by using the equilibrated alloy method with scanning electron microscopy (SEM), electron probe microanalysis (EPMA) and X-ray diffraction (XRD). The experimental results reveal that the ternary intermetallic compounds τ 3 -Sm(Fe, Ti) 11 was observed at 873 K and 1073 K, while τ 1 -Sm(Fe, Ti) 12 were found at 1073 K. Meanwhile, two ternary interme