In-field heat treatment effect on nitridation of Sm2Fe17

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

doi:10.2320/matertrans.MT-MAW2019009

In-field heat treatment effect on nitridation of Sm₂Fe₁₇

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

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

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 Sm₂Fe₁₇N_2.9 was obtained at 743 K.

Original language	English
Pages (from-to)	2179-2182
Number of pages	4
Journal	Materials Transactions
Volume	60
Issue number	10
DOIs	https://doi.org/10.2320/matertrans.MT-MAW2019009
Publication status	Published - 2019
Externally published	Yes

Keywords

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

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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@article{709a7b48c99b4ac1ab0d71a24e1e7624,

title = "In-field heat treatment effect on nitridation of Sm2Fe17 ",

abstract = "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.",

keywords = "Gas-solid reaction, In-field heat treatment, SmFeN, Zeeman energy",

author = "Masahira Onoue and Ryota Kobayashi and Yoshifuru Mitsui and Umetsu, {Rie Y.} and Yoshiya Uwatoko and Keiichi Koyama",

note = "Funding Information: The authors are grateful to Prof. H. Fujii of Hiroshima University for providing the Sm2Fe17 host compound. This work was partly supported by KAKENHI 17H00289 and Iketani Science and Technology Foundation 0301019-A. Magnetization measurements were performed at the Institute for Materials Research, Tohoku University and the Institute for Solid State Physics, The University of Tokyo.",

year = "2019",

doi = "10.2320/matertrans.MT-MAW2019009",

language = "English",

volume = "60",

pages = "2179--2182",

journal = "Materials Transactions",

issn = "1345-9678",

publisher = "Japan Institute of Metals (JIM)",

number = "10",

}

TY - JOUR

T1 - In-field heat treatment effect on nitridation of Sm2Fe17

AU - Onoue, Masahira

AU - Kobayashi, Ryota

AU - Mitsui, Yoshifuru

AU - Umetsu, Rie Y.

AU - Uwatoko, Yoshiya

AU - Koyama, Keiichi

N1 - Funding Information: The authors are grateful to Prof. H. Fujii of Hiroshima University for providing the Sm2Fe17 host compound. This work was partly supported by KAKENHI 17H00289 and Iketani Science and Technology Foundation 0301019-A. Magnetization measurements were performed at the Institute for Materials Research, Tohoku University and the Institute for Solid State Physics, The University of Tokyo.

PY - 2019

Y1 - 2019

N2 - 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.

AB - 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.

KW - Gas-solid reaction

KW - In-field heat treatment

KW - SmFeN

KW - Zeeman energy

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JO - Materials Transactions

JF - Materials Transactions

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