Magnetic properties of Nd-Fe-B-M (M=Si, C) bulk nanocomposite magnets prepared by the spark plasma sintering method

Tomokazu Fukuzaki, Keisuke Tanaka, Kazue Nishimoto, Yuji Muro, Keishi Nishio, Ryuji Tamura

    Research output: Contribution to journalConference articlepeer-review

    Abstract

    We have prepared Nd2Fe14B/Fe3B bulk nanocomposite magnets at the compositions Nd4Fe77.5B 18.5-xMx (M=Si, C) by substituting other elements M for B. For the sample substituted with 1 at.%Si, the coercivity exhibits the highest value of 227 kA/m when sintered at 600 °C. In addition, the grain sizes of the Nd2Fe14B and the Fe3B phases are found to depend on the ramp-up time during sintering and the reduction of the grain size leads to an increase of the coercivity. On the other hand, the samples substituted with C exhibit soft magnetic behaviors, which is attributed to the suppression of the Nd2Fe14B hard phase.

    Original languageEnglish
    Pages (from-to)92-98
    Number of pages7
    JournalMaterials Research Society Symposium Proceedings
    Volume1032
    Publication statusPublished - 2008
    EventNanoscale Magnetic Materials and Applications - Boston, MA, United States
    Duration: 2007 Nov 262007 Nov 30

    ASJC Scopus subject areas

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

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