Magnetic Properties of Low Rare-earth Content (Nd=2-7 at. %) .ALPHA.-Fe/Nd2Fe14B type Bulk Exchange-Spring Magnets.

DOI Web Site 1 Citations 13 References
  • Ono Hideaki
    Materials Research Laboratory, Nissan Research Center, Nissan Motor Co., Ltd.
  • Tayu Tetsuro
    Materials Research Laboratory, Nissan Research Center, Nissan Motor Co., Ltd.
  • Waki Norihisa
    Materials Research Laboratory, Nissan Research Center, Nissan Motor Co., Ltd.
  • Sugiyama Tatsuo
    Materials Research Laboratory, Nissan Research Center, Nissan Motor Co., Ltd.
  • Shimada Munekatsu
    Materials Research Laboratory, Nissan Research Center, Nissan Motor Co., Ltd.
  • Kanou Makoto
    Materials Research Laboratory, Nissan Research Center, Nissan Motor Co., Ltd.
  • Fujiki Akira
    Powertrain Operation Division, Nissan Motor Co., Ltd.
  • Yamamoto Hiroshi
    School of Science and Technology, Meiji Univ.
  • Takasugi Keisuke
    School of Science and Technology, Meiji Univ.
  • Tani Masato
    SCM Division, IZUMI TECHNOLOGY CO., LTD.

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Other Title
  • 磁性材料　　低希土類元素含有（Ｎｄ＝２～７ａｔ．％）α‐Ｆｅ／Ｎｄ２Ｆｅ１４Ｂｔｙｐｅバルク交換スプリング磁石の磁気特性
  • テイキドルイ ゲンソ ガンユウ Nd 2 7at アルファ Fe Nd2Fe14B type バルク コウカン スプリング ジシャク ノ ジキ トクセイ

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Abstract

Magnetic properties and structures of low rare-earth content (Nd=2-7at.%) α-Fe/Nd2e14B type Nd-Fe-Co-V-B system bulk exchange-spring magnets prepared by the Spark Plasma Sintering (SPS) method were investigated. In this range of Nd content, the bulk magnets showed the same magnetic properties as those of the annealed ribbons used as the raw materials. The saturation magnetization and soft/hard phase ratio corresponded with the estimated values. However, the exchange coupling strength decreased conspicuously with a lower Nd content presumably as a result of an increase in the grain size.

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