Phase relations of the SmFeTi system around the compound SmFe11Ti

Yoon Bae Kim, Satoshi Sugimoto, Masuo Okada, Motofumi Homma

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Phase relations of the SmFeTi system were studied, especially surrounding the compound SmFe11Ti. Isothermal sections of the iron-rich corner of the SmFeTi system were constructed, based tentatively on microstructural studies. The as cast SmFe11Ti alloy was nearly single phase with a ThMn12-type structure. It was found that the phases α-Fe(Ti), Fe2Ti, Fe17Sm2, Fe3Sm and Fe2Sm exist around the composition of the SmFe11Ti compound after annealing at 800 °C. After annealing at 1000 °C, a liquid and a high temperature phase exist instead of the Fe3Sm and Fe2Sm phases. The high temperature phase, which is believed to be non-magnetic or weakly magnetic, was observed in samarium-rich alloys with high titanium content. The composition of this high temperature phase was identified as SmFe3Ti2 by scanning electron microscopy and energy-dispersive X-rays. In the meltspun samples, the SmFe11Ti showed the highest coercivity of the alloys studied. The course of coercivity of melt-spun samples revealed that coercivity is most sensitive to samarium content among the components of the SmFeTi system.

Original languageEnglish
Pages (from-to)215-224
Number of pages10
JournalJournal of Alloys and Compounds
Issue number2
Publication statusPublished - 1991 Nov 25


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