The terbium-iron phase diagram

M. P. Dariel, J. T. Holthuis, M. R. Pickus

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64 Scopus citations


The terbium-iron phase diagram has been determined using metallographic, X-ray diffraction, differential thermal analysis, and electron microprobe techniques. The terminal solubilities of the two elements are extremely restricted, of the order of 0.1 at.% for Tb in Fe. A eutectic reaction takes place at 28 at.% Fe, 847 °C. The four intermetallic compounds, TbFe2, TbFe3, Tb6Fe23, and Tb2Fe17 melt non-congruently at 1187, 1212, 1276, and 1312 °C, respectively. The Tb2Fe17 compound appears in the rhombohedral Th2Zn17 modification on the Tb-rich side and in the hexagonal Th2Ni17 modification on the Fe-rich side of the stoichiometric composition.

Original languageEnglish
Pages (from-to)91-101
Number of pages11
JournalJournal of the Less-Common Metals
Issue number1
StatePublished - 1 Jan 1976
Externally publishedYes

ASJC Scopus subject areas

  • Engineering (all)


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