On the formation of ternary phases in the Ti–Fe–Sn ternary system at 773 K

The phase equilibria of the Ti-Fe-Sn ternary system were studied at 773 K in the whole concentration range using X-ray diffraction and metallographic analyses.The Ti-Fe-Sn ternary system at 773 K is characterized by the formation of three ternary intermetallic compounds: TiFe 2 Sn (MnCu 2 Al-type), Ti 5 FeSn 3 (Hf 5 CuSn 3type), and Ti 0.4 Fe 0.6 Sn 2 (Mg 2 Ni-type).The existence of substitutional solid solutions TiFe 2-x Sn x (up to 5 at.%Sn) and Ti 6-х Fe x Sn 5 (up to 5 at.%Fe) was observed.The limiting composition of the Ti 5 Fe x Sn 3 solid solution (x = 1.0) is considered as a distinct compound with Hf 5 CuSn 3 structure type.