Coercivity Recovery Effect of Sm-Fe-Cu-Al Alloy on Sm2Fe17N3 Magnet

Kohei Otogawa, Toru Asahi, Miho Jinno, Wataru Yamaguchi, Kenta Takagi, Hansang Kwon

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    The potential of a Sm-Fe-Cu-Al binder for improvement of the magnetic properties of Sm2Fe17N3 was examined. Transmission electron microscope (TEM) observation of a Sm-Fe-Cu-Al alloy-bonded Sm2Fe17N3 magnet which showed high coercivity revealed that the Sm-Fe-Cu-Al alloy had an effect of removing the surface oxide layer of the Sm2 Fe17N3 grains. However, the Sm-Fe-Cu-Al binder was contaminated by carbon and nitrogen, which originated from the organic solvent used as the milling medium during pulverization. To prevent carbon and nitrogen contamination, the Sm-Fe- Cu-Al alloy was added directly on the surface of the Sm2Fe17N3 grains by sputtering. Comparing the recovered coercivity per unit amount of the added binder the uncontaminated binder-coated sample had a higher coercivity recovery effect than the milled binder-added sample. These results suggested that sufficient addition of the contamination-free Sm-Fe-Cu-Al binder has the possibility to reduce the amount of binder necessary to produce a high coercive Sm2Fe17N3 magnet.

    Original languageEnglish
    Pages (from-to)716-725
    Number of pages10
    JournalJournal of the Korean Physical Society
    Volume72
    Issue number6
    DOIs
    Publication statusPublished - 2018 Mar 1

    Fingerprint

    coercivity
    magnets
    recovery
    contamination
    nitrogen
    carbon
    electron microscopes
    sputtering
    magnetic properties
    oxides

    Keywords

    • Quaternary eutectic alloy
    • SmFeN magnet
    • Sputter coating

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Coercivity Recovery Effect of Sm-Fe-Cu-Al Alloy on Sm2Fe17N3 Magnet. / Otogawa, Kohei; Asahi, Toru; Jinno, Miho; Yamaguchi, Wataru; Takagi, Kenta; Kwon, Hansang.

    In: Journal of the Korean Physical Society, Vol. 72, No. 6, 01.03.2018, p. 716-725.

    Research output: Contribution to journalArticle

    Otogawa, Kohei ; Asahi, Toru ; Jinno, Miho ; Yamaguchi, Wataru ; Takagi, Kenta ; Kwon, Hansang. / Coercivity Recovery Effect of Sm-Fe-Cu-Al Alloy on Sm2Fe17N3 Magnet. In: Journal of the Korean Physical Society. 2018 ; Vol. 72, No. 6. pp. 716-725.
    @article{490e3db3df454fb7a54f5c4acbcb33f4,
    title = "Coercivity Recovery Effect of Sm-Fe-Cu-Al Alloy on Sm2Fe17N3 Magnet",
    abstract = "The potential of a Sm-Fe-Cu-Al binder for improvement of the magnetic properties of Sm2Fe17N3 was examined. Transmission electron microscope (TEM) observation of a Sm-Fe-Cu-Al alloy-bonded Sm2Fe17N3 magnet which showed high coercivity revealed that the Sm-Fe-Cu-Al alloy had an effect of removing the surface oxide layer of the Sm2 Fe17N3 grains. However, the Sm-Fe-Cu-Al binder was contaminated by carbon and nitrogen, which originated from the organic solvent used as the milling medium during pulverization. To prevent carbon and nitrogen contamination, the Sm-Fe- Cu-Al alloy was added directly on the surface of the Sm2Fe17N3 grains by sputtering. Comparing the recovered coercivity per unit amount of the added binder the uncontaminated binder-coated sample had a higher coercivity recovery effect than the milled binder-added sample. These results suggested that sufficient addition of the contamination-free Sm-Fe-Cu-Al binder has the possibility to reduce the amount of binder necessary to produce a high coercive Sm2Fe17N3 magnet.",
    keywords = "Quaternary eutectic alloy, SmFeN magnet, Sputter coating",
    author = "Kohei Otogawa and Toru Asahi and Miho Jinno and Wataru Yamaguchi and Kenta Takagi and Hansang Kwon",
    year = "2018",
    month = "3",
    day = "1",
    doi = "10.3938/jkps.72.716",
    language = "English",
    volume = "72",
    pages = "716--725",
    journal = "Journal of the Korean Physical Society",
    issn = "0374-4884",
    publisher = "Korean Physical Society",
    number = "6",

    }

    TY - JOUR

    T1 - Coercivity Recovery Effect of Sm-Fe-Cu-Al Alloy on Sm2Fe17N3 Magnet

    AU - Otogawa, Kohei

    AU - Asahi, Toru

    AU - Jinno, Miho

    AU - Yamaguchi, Wataru

    AU - Takagi, Kenta

    AU - Kwon, Hansang

    PY - 2018/3/1

    Y1 - 2018/3/1

    N2 - The potential of a Sm-Fe-Cu-Al binder for improvement of the magnetic properties of Sm2Fe17N3 was examined. Transmission electron microscope (TEM) observation of a Sm-Fe-Cu-Al alloy-bonded Sm2Fe17N3 magnet which showed high coercivity revealed that the Sm-Fe-Cu-Al alloy had an effect of removing the surface oxide layer of the Sm2 Fe17N3 grains. However, the Sm-Fe-Cu-Al binder was contaminated by carbon and nitrogen, which originated from the organic solvent used as the milling medium during pulverization. To prevent carbon and nitrogen contamination, the Sm-Fe- Cu-Al alloy was added directly on the surface of the Sm2Fe17N3 grains by sputtering. Comparing the recovered coercivity per unit amount of the added binder the uncontaminated binder-coated sample had a higher coercivity recovery effect than the milled binder-added sample. These results suggested that sufficient addition of the contamination-free Sm-Fe-Cu-Al binder has the possibility to reduce the amount of binder necessary to produce a high coercive Sm2Fe17N3 magnet.

    AB - The potential of a Sm-Fe-Cu-Al binder for improvement of the magnetic properties of Sm2Fe17N3 was examined. Transmission electron microscope (TEM) observation of a Sm-Fe-Cu-Al alloy-bonded Sm2Fe17N3 magnet which showed high coercivity revealed that the Sm-Fe-Cu-Al alloy had an effect of removing the surface oxide layer of the Sm2 Fe17N3 grains. However, the Sm-Fe-Cu-Al binder was contaminated by carbon and nitrogen, which originated from the organic solvent used as the milling medium during pulverization. To prevent carbon and nitrogen contamination, the Sm-Fe- Cu-Al alloy was added directly on the surface of the Sm2Fe17N3 grains by sputtering. Comparing the recovered coercivity per unit amount of the added binder the uncontaminated binder-coated sample had a higher coercivity recovery effect than the milled binder-added sample. These results suggested that sufficient addition of the contamination-free Sm-Fe-Cu-Al binder has the possibility to reduce the amount of binder necessary to produce a high coercive Sm2Fe17N3 magnet.

    KW - Quaternary eutectic alloy

    KW - SmFeN magnet

    KW - Sputter coating

    UR - http://www.scopus.com/inward/record.url?scp=85044295409&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=85044295409&partnerID=8YFLogxK

    U2 - 10.3938/jkps.72.716

    DO - 10.3938/jkps.72.716

    M3 - Article

    VL - 72

    SP - 716

    EP - 725

    JO - Journal of the Korean Physical Society

    JF - Journal of the Korean Physical Society

    SN - 0374-4884

    IS - 6

    ER -