Interaction of the components in the V{Fe,Ni}Sn ternary systems

 

Chem. Met. Alloys 8 (2015) 75-82

 

L. ROMAKA, M. KONYK, Yu. STADNYK, A. HORYN, V.V. ROMAKA, R. SERKIZ, V. KRAYOVSKYY

 

The phase equilibria of the VFeSn and VNiSn ternary systems at 873 K and 773 K, respectively, were studied in the whole concentration range, using X-ray diffraction and metallographic analysis. The VFeSn ternary system at 873 K is characterized by the formation of two ternary intermetallic compounds, VFe2Sn (MnCu2Al-type, space group Fm-3m, a = 0.59641(3) nm) and (V,Fe)Sn2 (Mg2Ni-type, space group P6222, a = 0.5441(1)-0.5437(1), c = 1.3852(2)-1.3769(5) nm). In the VNiSn system at 773 K only one ternary compound, VNi2Sn (MnCu2Al-type, a = 0.6031(1) nm), was observed. Electrical resistivity and thermopower were measured for the (V,Fe)Sn2 compound in the temperature range 80-380 K. The compound shows metallic type of conductivity in the investigated temperature range.

 

Isothermal section of the phase diagram of the VFeSn system at 873 K

 

Keywords

Stannides / Phase diagram / EPMA / Electrical properties / X-ray powder diffraction