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Development of high performance Fe-based magnets utilizing computer analysis and crystallization from amorphous state

Research Project

Project/Area Number 08650384
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Electronic materials/Electric materials
Research InstitutionNagasaki University

Principal Investigator

FUKUNAGA Hirotoshi  Nagasaki Univ., Fac.of Engng.Professor, 工学部, 教授 (10136533)

Co-Investigator(Kenkyū-buntansha) NAKANO Masaki  Nagasaki Univ., Fac.of Engng.Research Associate, 工学部, 助手 (20274623)
KANAI Yasuhisa  Nagasaki Univ., Fac.of Engng.Lecturer, 工学部, 講師 (00264200)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1997: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1996: ¥1,700,000 (Direct Cost: ¥1,700,000)
Keywordsnanocomposite magnets / spring magnets / coercivity / maximum energy product / intergrain exchange interaction / Nd-Fe-B / crystallization / computer simulation / スプリングマグネット / ナノコンポジットマグネット / 結晶粒径 / ナンコンポジットマグネット / 着磁特性 / リコイル特性
Research Abstract

The following results were obtained by computer simulation for Nd-Fe-B-based nanocomposite magnets.
(1) Large maximum energy product is obtained in magnets composed of 60% soft magnetic phases and 40% Nd_2Fe_<14>B with about 20nm grain diameter.
(2) Fluctuation of the strength of intetgrain exchange interaction deteriorates magnetic properties of nanocomposite magnets.
(3) Two kinds of magnets can be prepared by controlling grain diameter consisting of magnets. One of them has good magnetizability and the other has good recoil properties.
Based on the above results, we tried to prepare Nd-Fe-B-based nanocomposite magnets from Nd-Fe-B amorphous alloys. The results are :
(1) Good hard magnetic properties were obtained in magnets including 60% soft magnetic phases.
(2) In order to suppress fluctuation of the strength of intergrain exchange interaction, magnets with amorphous Fe-Si-B phase between Fe_3B and Nd_2Fe_<14>B phases were prepared. However, an improvement in hard magnetic properties was not achieved because the grain diameter and the amount of soft magnetic phases did not satisfy the above-mentioned conditions.
(3) Two kinds of magnets, magnets with good magnetizability or those with good recoil properties, were prepared by controlling crystallization condition of amorphous Nd-Fe-B alloys.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] H.Fukunaga et al.: "Computer Simulation of Magnetic Properties of Nanocomposite Magnets" Materials Transactions,JIM. 37. 864-869 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] J.Zbroszczyk and H.Fukunaga et al.: "The role of Nb and Cu in the creation of nanostructure in Fe-based amorphous alloys" J.Magnetism and Magnetic Materials. 160. 277-278 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Fukunaga et al.: "Stability of a Nd-Fe-B based magnet consolidated from a mixture of isotropic and anisotropic powders" J.Magnetism and Magnetic Materials. 157/158. 63-64 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Fukunaga et al.: "Improvement in hard magnetic properties of rapidly quenched Sm-Fe-N flakes by Zn-coating" J.Magnetism and Magnetic Materials. 157/158. 105-106 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Fukunaga et al.: "New Soft Magnetic Material with Constant and Adjustable Permeability" IEEE Transaction on Magnetics. 33. 3787-3789 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] J.Kuma, N.Kitajima, Y.Kanai, and H.Fukunaga: "Maximum Energy Product of Isotropic Nd-Fe-B-Based Nanocomposite Magnets" Journal of Applied Physics. 83(掲載予定). (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Fukunaga et al.: "Computer Simulation of Magnetic Properties of Nanocomposite Magnets" Materials Transactions, JIM. Vol.37. 864-869 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] J.Zbroszczyk and H.Fukunaga et al.: "The role of Nb and Cu in the creation of nanostructure in Fe-based amorphous alloys" J.Magnetism and Magnetic Materials. Vol.160. 277-278 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Fukunaga et al.: "Stability of a Nd-Fe-B based magnet consolidated from a mixture of isotropic and anisotropic powders" J.Magnetism and Magnetic Materials. Vol.157/158. 63-64 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Fukunaga et al.: "Improvement in hard magnetic properties of rapidly quenched Sm-Fe-N flakes by Zn-coating" J.Magnetism and Magnetic Materials. Vol.157/158. 105-106 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Fukunaga et al.: "New Soft Magnetic Material with Constant and Adjustable Permeability" IEEE Transaction on Magnetics. Vol.33. 3787-3789 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] J.Kuma, N.Kitajima, Y.Kanai, and H.Fukunaga: "Maximum Energy Product of Isotropic Nd-Fe-B-Based Nanocomposite Magnets" Journal of Applied Physics. (to be published in Vol.83). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H. Fukunaga, N. Kitajima, and Y. Kanai: "Computer Simulaion of Magnetic Properties of Nanocomposite Nagnets" Materials Transactions, JIM. 37. 864-869 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] J. Zbroszczyk and H. Fukunaga et al.: "The role of Nd and Cu in the creation of nanostructure in Fe-based amorphous alloys" J. Magnetism and Nagnetic Materilas. 160. 277-278 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] H. Fukunaga et al.: "Satbility of a Nd-Fe-B based magnet consolidated from a mixture of isotropic and. anisotropic powders" J. Magnetism and Nagnetic Materilas. 157/158. 63-64 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] H. Fukunaga T. Aikawa, and S. Nagaoka and Y. Kanai: "Improvement in hard magnetic properties of repidly quenched Sm-Fe-N flakes by Zn-coating" J. Magnetism and Nagnetic Materilas. 157/158. 105-106 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] H. Fukunaga et al.: "New Soft Magnetic Material with Constant and Adjustable Permeability" IEEE Transaction on Magnetics.33. 3787-3789 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] J. Kuma, N. Kitajima, Y. Kanai, and H. Fukunaga: "Maximum Energy Product of lsotropic Nd-Fe-B-Based Nanocomposite Magnets" Journal of Applied Physics. 83(掲載予定). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 熊純哉,北島望,金井泰久,福永博俊: "スプリングマグネットの磁気特性の計算機シミュレーション" 平成8年度電気学会全国大会講演論文集. 2. 289- (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 熊純哉,北島望,金井泰久,福永博俊: "ナンコンポジット磁石の磁気特性の計算機解析" 第20回日本応用磁気学会学術講演会概要集. 95- (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] H.Fukunaga,N.Kitajima.and Y.Kanai: "Computer Simulaion of Magnetic Properties of Nanocomposite Magnets" Materials Transactions,JIM. 37. 864-869 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] J.Zbroszczyk and H.Fukunaga et al.: "The role of Nb and Cu in the creation of nanostructure in Fe-based amorphous alloys" J.Magnetism and Magnetic Materilas. 160. 277-278 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] H.Fukunaga et al.: "Satbility of a Nd-Fe-B based magnet consolidated from a mixture of isotropic and anisotropic powders" J.Magnetism and Magnetic Materilas. 157/158. 63-64 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] H.Fukunaga,T.Aikawawa and S.Nagaoka and Y.Kanai: "Improvement in hard magnetic properties of rapidly quenched Sm-Fe-N flakes by Zn-coating" J.Magnetism and Magnetic Materilas. 157/158. 105-106 (1996)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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