Phase equilibria in Ho-Fe-Sn ternary system at 670 K

L. Romaka; Yu. Stadnyk; V. V. Romaka; A. Horpenyuk

doi:10.15330/pcss.21.2.272-278

Authors

L. Romaka Ivan Franko L’viv National University
Yu. Stadnyk Ivan Franko L’viv National University
V. V. Romaka Lviv Polytechnic National University; Institute for Solid State Research
A. Horpenyuk Lviv Polytechnic National University

DOI:

https://doi.org/10.15330/pcss.21.2.272-278

Keywords:

Intermetallics, Stannides, Phase diagrams, Crystal structure, X-ray diffraction

Abstract

Interaction between the components in the Ho-Fe-Sn ternary system was studied using X-ray diffractometry, metallography and electron microprobe analysis. Isothermal section of the phase diagram was constructed at 670 K over the whole concentration range. Component interaction in the Ho-Fe-Sn system at 670 K results in the existence of one ternary compound HoFe₆Sn₆ which crystallizes in the YCo₆Ge₆ structure type (space group P6/mmm, a=0.53797(2), c= 0.44446(2) nm). The interstitial-type solid solution HoFe_xSn₂ (up to 8 at.% Fe) based on the HoSn₂ (ZrSi₂-type structure) binary compound was found. Solubility of Sn in the HoFe₂ binary (MgCu₂ structure type) extends up to 5 at. %.

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