On the formation of ternary phases in the TiFeSn ternary system at 773 K

 

Chem. Met. Alloys 6 (2013) 12-19

 

L. ROMAKA, V.V. ROMAKA, Yu. STADNYK, N. MELNYCHENKO

 

The phase equilibria of the TiFeSn ternary system were studied at 773 K in the whole concentration range using X-ray diffraction and metallographic analyses. The TiFeSn ternary system at 773 K is characterized by the formation of three ternary intermetallic compounds: TiFe2Sn (MnCu2Al-type), Ti5FeSn3 (Hf5CuSn3-type), and Ti0.4Fe0.6Sn2 (Mg2Ni-type). The existence of substitutional solid solutions TiFe2-xSnx (up to 5 at.% Sn) and Ti6-FexSn5 (up to 5 at.% Fe) was observed. The limiting composition of the Ti5FexSn3 solid solution (x = 1.0) is considered as a distinct compound with Hf5CuSn3 structure type.

 

 

Isothermal section of the TiFeSn phase diagram at 773 K

 

Keywords

Stannides / Phase diagram / Solid solution / EPMA / Electronic structure