In-field heat treatment effect on nitridation of Sm2Fe17

Masahira Onoue, Ryota Kobayashi, Yoshifuru Mitsui, Rie Y. Umetsu, Yoshiya Uwatoko, Keiichi Koyama

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3 Citations (Scopus)


An in-field heat treatment furnace utilized for a magnet with a 50 mm room-temperature bore was made to study magnetic field effect on gas-solid reaction. Using this furnace, nitridation of Sm2Fe17 powder was performed under a 5-T magnetic field and a 0.1-MPa nitrogen gas pressure for the temperature range 623 to 743 K. Applying a magnetic field of 5 T promoted nitridation by approximately 0.6 nitrogen atoms per formula unit compared with zero-field nitridation, and almost fully nitride Sm2Fe17N2.9 was obtained at 743 K.

Original languageEnglish
Pages (from-to)2179-2182
Number of pages4
JournalMaterials Transactions
Issue number10
Publication statusPublished - 2019


  • Gas-solid reaction
  • In-field heat treatment
  • SmFeN
  • Zeeman energy


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