Effect of annealing on microstructural changes of Nd-rich phases and magnetic properties of Nd–Fe–B sintered magnet

D. W. Park, Tae Hoon Kim, Seong Rae Lee, D. H. Kim, T. S. Jang

    Research output: Contribution to journalArticlepeer-review

    17 Citations (Scopus)

    Abstract

    The microstructural changes of Nd-rich interface phases during postsintering annealing were investigated. A mixture of very fine (about 2–3 nm) crystallites of hexagonal [formula omitted], cubic [formula omitted] [formula omitted], and amorphous phases were observed at the interface phase in the as-sintered magnet and after the first postsintering annealing process. The transformation from [formula omitted] to [formula omitted] occurred during the second postsintering annealing process, and the resulting [formula omitted] has the proper crystallographic relation with the main phase. The reduced lattice mismatch between the (110) plane of [formula omitted] interface phase and the (001) or (100) plane of Nd–Fe–B main phase after the second postsintering annealing process is the primary reason for the enhancement in the magnetic properties.

    Original languageEnglish
    Pages (from-to)179
    Number of pages1
    JournalJournal of Applied Physics
    Volume107
    Issue number9
    DOIs
    Publication statusPublished - 2010 May 1

    ASJC Scopus subject areas

    • General Physics and Astronomy

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