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Permanent magnet materials—Developments during the past 12 months

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Abstract

Information about real and potential permanent magnet materials continues to grow at a rapid pace, and developments in the following areas are discussed. Co- Zr, although not comparable to the best high-performance magnets, has attracted interest as a rare earth free alloy. Carbon and nitrogen are becoming more prominent as the metalloid in iron- rare earth magnets. This leads to cast magnets based on Fe-Nd-C, bonded magnets based on Fe17Sm2Nx, a renewed interest in the tetragonal phase (Fe,Ti)12Nd, now with added nitrogen, and a nitrogen treatment for sintered Fe14Nd2B that raises the Curie temperature by more than 100 K. Alloying additions to Fe14Nd2B improve the coercivity. Finally, developments in corrosion protection and processing are highlighted.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina

    H. H. Stadelmaier

  2. Institut für Werkstoffwissenschaft, Max-Planck-Institut für Metallforschung, Stuttgart, Germany

    E.- Th. Henig

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Stadelmaier, H.H., Henig, E.T. Permanent magnet materials—Developments during the past 12 months. JMEP 1, 167–174 (1992). https://doi.org/10.1007/BF02648614

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