• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Development of a Strong Magnets with the high anisotropy by using HDDR and micro alloying process

Research Project

Project/Area Number 12555173
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Physical properties of metals
Research InstitutionMiyagi National College of Technology

Principal Investigator

MATSUURA Makoto  Miyagi National College of Technology, Science and Mathematics, Professor, 総合科学系・理数科, 教授 (40042262)

Co-Investigator(Kenkyū-buntansha) KONNO Kazuya  Miyagi National College of Technology, Science and Mathematics, Assistant Professor, 総合科学系・理数科, 助教授 (80270198)
SUZUKI Katsuhiko  Miyagi National College of Technology, Science and Mathematics, Professor, 総合科学系・理数科, 教授 (80187715)
IKUTA Nobuyuki  Miyagi National College of Technology, Science and Mathematics, Professor, 総合科学系・理数科, 教授 (50042255)
Project Period (FY) 2000 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥11,400,000 (Direct Cost: ¥11,400,000)
Fiscal Year 2002: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2001: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 2000: ¥8,600,000 (Direct Cost: ¥8,600,000)
KeywordsNd_2Fe_<14>B / HDDR / XAFS / micro alloying / Hydrogen / Zr / Ga / Ga添加効果 / 微量添加元素 / 水素処理 / HDDR / 微量添加物 / 水素
Research Abstract

The main aim of this study is to elucidate the role of small additives on the enhancement of magnetic anisotropy of Nd_2Fe_<14>B based magnets during Hydrogenation, Disproportionation, Desorption and Recombination (HDDR) process.
The following results are obtained through this researching project.
1) Nb in Nd_<12.5>Fe_<bal>Ga_<0.3>Nb_<0.2>B_<6.2> forms FeNbB compound in the as-cast state and it is stable through HDDR process.
2) Ga in Nd_<12.5>Fe_<bal>Ga_<0.3>Nb_<0.2>B_<6.2> preferentially occupies Fe(4c) site at the homogenized state and transfers to bcc Fe at the disproportionated state.
3) At the beginning of recombination stage, Nd_2Fe_<14>B forms preferentially at the place where Ga is included.
4) From this result we can infer that Ga is included in bcc Fe near the grain boundary region and the recombination of Nd_2Fe_<14>B start from the grain boundary where Ga is included.
5) Zr in homogenized Nd_<12.5>Fe_<bal>Zr_<0.5>B_6, which is prepared by arc melting forms ZrB and this ZrB compound is stable through HDDR process.
6) Site preference of Zr in a melt-quenched Nd_<12.5>Fe_<bal>Zr_<0.5>B_6 ribbon differs from the sample prepared by arc melting ; Zr in melt-quenched Nd_<12.5>Fe_<bal>Zr_<0.5>B_6 occupies Nd(4f) site rather than Zr site in ZrB for the sample prepared by arc melting.

Report

(4 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report

Research Products

(17 results)

All Other

All Publications

  • [Publications] K.Konno, M.Matsuura, N.Ikuta, K.Asada, M.Sakurai: "Anomalous rapid change of site preference of Ga at the beginning of recombination in the HDDR for Nd_<12.5>Fe_<bal>Ga_<0.3>Nb_<0.2>B_<6.2>magnets"Proc.17^<th> Rare Earth Magnets and Their Applications. 22. 169-175 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K.Konno, M.Matsuura, N.Ikuta, M.Sakurai, C.Mishima: "Site occupancy of Ga and Nb in Nd_<12.5>Fe_<bal>Ga_<0.3>Nb_<0.2>B_<6.2> during the hydrogenation, disproportionation, desorption, and recombination process"J.Appl.Phys.. 91. 7875-7877 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M.Matsuura, A.Ashfaq, K.Konno, M.Sakurai: "Preferential site occupancy of Zr in Nd_2Fe_<14>B based magnets : Effects of concentration and HDDR process"Proc.16^<th> Rare Earth Magnets and Their Applications. 21. 855-861 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Ashfaq, M.Matsuura, M.Sakurai: "XAFS study of Zr site preference for Nd_<16>Fe_<75.5>Zr_<0.5>B_8 in disproportionated, partially/fully recombined states of HDDR process"J.Mag.Mag.Mat.. 212. 368-372 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K. Konno, M. Matsuura, N. Ikuta, K. Asada and M. Sakurai: "Anomalous rapid change of site preference of Ga at the beginning of recombination in the HDDR for Nd_<12.5>Fe_<bal>Ga_<0.3>Nb_<0.2>B_<6.2> magnets"Proc. 17^<th> Rare Earth Magnets and Their Applications. 22. 169-175 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K. Konno, M. Matsuura, N. Ikuta, M. Sakurai, C. Mishima: "Site occupancy of Ga and Nb in Nd_<12.5>Fe_<Bal>Ga_<0.3>Nb_<0.2>B_<6.2> during the hydrogenation, disproportionation, desorption, and recombination process"J.Appl.Phys.. 91. 7875-7877 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M. Matsuura, A. Ashfaq, K. Konno, M. Sakurai: "Preferential site occupancy of Zr in Nd_2Fe_<14>B based magnets : Effects of concentration and HDDR process"Proc. 16^<th> Rare Earth Magnets and Their Applications. 21. 855-861 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A. Ashfaq, M. Matsuura and M. Sakurai: "XAFS study of Zr site preference for Nd_<16>Fe_<75.5>Zr_<0.5>B_8 in disproportionated, partially/fully recombined states of HDDR process"J.Mag.Mag.Mat.. 212. 368-372 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M.Matsuura, M.Sakurai, K.Konno, K.Asada: "Nano size clusters indicating precursor of intermetallic compounds in supersaturated Fe_<99>Y_1 and Fe_<99>Zr_1 melt-quenched alloys"J. Mater. Sci.. (In press). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Matsuura, M.Sakurai, K.Amiya, A.Inoue: "Local structures around Zn and Y in the melt-quenched Mg_<97>Zn_1Y_2 ribbon"J. Alloys and Compounds. (In press). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] K.Konno, M.Matsuura, N.Ikuta, K.Asada: "Anomarous rapid change of site preference of Ga at the beginning of recombination in the HDDR for Nd_<12.5>Fe_<bal>Ga_<0.3>Nb_<0.2>B_<6.2> magnets"Proc. 17^<th> Rare Earth Magnets and Their Applications. 22. 169-175 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] K.Konno, M.Matsuura, N.Ikuta, M.Sakurai, C.Mishima: "Site occupancy of Ga and Nb in Nd_<12.5>Fe_<bal>Ga_<0.3>Nb_<0.2>B_<6.2> during the hydrogenation, disproportionation, desorption, and recombination process"J. Appl. Phys.. 91. 7875-7877 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] A.Ashfaq, M.Matsuura, M.Sakurai: "XAFS study of Zr site preference for Nd_<16>Fe_<75.5>Zr_<0.5>B_8 in disproportionated, partiall/fully recombined states of HDDR process"J. Mag. Mag. Mat.. 212. 368-372 (2000)

    • Related Report
      2002 Annual Research Report
  • [Publications] K.Konno, M.Matsuura, N.Ikuta, M.Sakurai, C.Mishima: "Site Occupancy of Ga and Nd in Nd_<12.5>Fe_<bal>Ga_<0.3>Nb_<0.2>B_<6.2> during HDDR Process"Journal of Applied Physics. Vol.91,No10(In press). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] K.Konno, M.Matsuura, N.Ikuta, K.Asada, M.Sakurai, C.Mishima: "Anomalous rapid change of site preference of Ga at the beginning of recombination in the HDDR for Nd_<12.5>Fe_<bal>Ga_<0.3>Nb_<0.2>B_<6.2>"Proc. of Seventeen International Workshop Rare-Earth Magnets and Their Application. (In press). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] M.Matsuura,A.Ashfaq,K.Konno and M.Sakurai: "Preferential site occupancy of Zr in Nd2Fe14B based magnets ; Effects of concentration and HDDR process"Proceedings of the Sixteenth International Workshop on Rare-Earth Magnets and Their Applications. 855-861 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] A.Ashfaq,M.Matsuura and M.Sakurai: "XAFS study of Zr site preference for Nd_<16>Fe_<75.5>Zr_<0.5>B_8 in disproportionated, partially/fully recombined states of HDDR process"Journal of Magnetism and Magnetic Materials. 212. 368-372 (2000)

    • Related Report
      2000 Annual Research Report

URL: 

Published: 2000-03-31   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi