Quantitative analysis of factors increasing coercive force of iron powder cores-influence of porosity

Takuya Takashita, Yukiko Ozaki

    研究成果: ジャーナルへの寄稿学術誌査読

    1 被引用数 (Scopus)

    抄録

    The effect of porosity on coercive force in iron powder cores with different porosities was analyzed quantitatively. The coercive force of the iron powder cores decreased 11.0Am-1 with a decrease in porosity of 0.01. From in-situ observation by Kerr effect microscopy, nucleation of the reverse domain was observed in local areas along narrow gaps such as the contact interface between particles and fine pores among particles, and nucleation of the reverse domain did not occur at coarse pores. This indicates that the local decrease in the diamagnetic field with a decrease in porosity may be reduced in these areas, resulting in a decrease in coercive force. This result suggests that densification of iron powder cores can be an effective method for reducing coercive force.

    本文言語英語
    ページ(範囲)703-710
    ページ数8
    ジャーナルMaterials Transactions
    62
    6
    DOI
    出版ステータス出版済み - 2021

    !!!All Science Journal Classification (ASJC) codes

    • 材料科学(全般)
    • 凝縮系物理学
    • 材料力学
    • 機械工学

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