Component
interaction in the ternary system Lu–Fe–Sn
at 670 K
Chem. Met. Alloys 14 (2021) 17-24
https://doi.org/10.30970/cma14.0415
L. ROMAKA, V.V. ROMAKA, Yu. STADNYK, I.
ROMANIV
The phase equilibria in the Lu–Fe–Sn ternary system were determined
at 670 K in the whole concentration range, using X-ray diffraction,
scanning electron microscopy and energy-dispersive spectrometry. The Lu-Fe-Sn
system is characterized by the existence of three ternary compounds at 670 K,
LuFe6Sn6 (MgFe6Ge6-type, space
group P6/mmm, a = 0.53741(6), c = 0.8875(1) nm), Lu5Fe6Sn18
(Tb4(Tb0.6Sn0.4)Rh6Sn18-type,
space group Fm-3m, a = 1.35324(5) nm),
and Lu117Fe52Sn112 (Tb117Fe52Ge112-type,
space group Fm-3m, a = 2.9425(8) nm).
An interstitial-type solid solution LuFexSn2,
based on the binary compound LuSn2 (ZrSi2-type), was
found (up to 7 at.% Fe). The solubility of Sn in binary LuFe2 (MgCu2-type)
extends up to 5 at.%.
Isothermal section of the Lu–Fe–Sn system at
670 K.
Keywords
Intermetallics / Phase diagram /
Crystal structure / Stannides