Magnetic properties and microstructures of the (SmFe10V2) 1 - x-(Sm2Fe17)x cast alloys

Satoshi Sugimoto, Tomoyasu Shimono, Hajime Nakamura, Toshio Kagotani, Masuo Okada, Motofumi Homma

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12 Citations (Scopus)


The present study shows the magnetic properties of (SmFe10V2)1 - x-(Sm2Fe17)x. cast alloys (x = 0-0.3), The alloys heat-treated below 700 °C show low coercivity but the alloys heat-treated at 800-1000 °C exhibit a relatively high coercivity of around 3 kOe. In particular, the stoichiometric SmFe10V2 alloy heat-treated at 900 °C for 20 h exhibits the highest coercivity of 3.7 kOe, which is the highest value among the reported values of ThMn12-type magnets in the cast state. This alloy consists of the SmFe10V2 phase, with grain sizes of several micrometers, and a small amount of the α-(Fe,V) phase. In the alloys heat-treated above 1100 °C, the SmFe10V2 phase disappears and the α-(Fe,V) phase exists as the major phase. It is considered that the annealing temperature at 1100 °C is higher than the peritectic temperature. The existence of the α- (Fe,V) phase as the major phase is the main reason for the decrease of coercivity.

Original languageEnglish
Pages (from-to)298-301
Number of pages4
JournalMaterials Chemistry and Physics
Issue number4
Publication statusPublished - 1995 Dec


  • Cast alloy
  • Coercivity
  • Heat treatment
  • SmFeV compound


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