Improvements in the Coercivity of Iron-Based Nanocrystalline Low-Rare-Earth Fe3B-Nd Permanent Magnets.

DOI 10 Citations 2 References

Bibliographic Information

Other Title
  • 超微細結晶型鉄基希土類Ｆｅ３Ｂ‐Ｎｄ磁石の高保磁力化

Description

Fe3B-based Nd-Fe-B permanent magnetic materials containing Co and Mas additives, where M is one of Al, Si, Cu, Ga, Ag, and Au, were prepared in an extremely low-rare-earth concentration range of around 4 atomic percent. The hard magnetic properties develop as a result of a heat treatment of rapidly solidified amorphous ribbons, which produces a metastable nanocrystalline structure consisting of Fe3B and Nd2Fe14B. Use of the additives considerably reduces the crystallite sizes, and consequently, the alloys attain higher coercivity than that obtained in alloys without the additives. Compaction-molded resin-borlded magnets produced from the Nd-Fe-B-Co-M materials have the following magnetic propertise: HcJ=300kA/m-470kA/m, Br=0.7 T-0.9 T, and (BH) max=50 kJ/m3-73 kJ/m3. The typical values of the temperature coefficients of Br and HcJ of the bonded magnets are -0.05%/K and -0.35%/K, respectively, in the 297 K-413 K range.

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Details 詳細情報について

  • CRID
    1390001205088074880
  • NII Article ID
    130004924242
  • DOI
    10.3379/jmsjmag.17.185
  • COI
    1:CAS:528:DyaK2MXis1Gktro%3D
  • ISSN
    18804004
    02850192
    http://id.crossref.org/issn/02850192
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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