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Preparation of Iron Nitrides with Ultrahigh Magnetization by MA in NH_3

Research Project

Project/Area Number06650802
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Material processing/treatments
Research InstitutionOsaka University

Principal Investigator

MAJIMA Kazuhiko  Osaka University・Faculty of Engineering, Associate Professor, 工学部, 教授 (60029270)

Project Period (FY) 1994 – 1995
Project Status Completed(Fiscal Year 1995)
Budget Amount *help
¥2,000,000 (Direct Cost : ¥2,000,000)
Fiscal Year 1995 : ¥300,000 (Direct Cost : ¥300,000)
Fiscal Year 1994 : ¥1,700,000 (Direct Cost : ¥1,700,000)
Keywordsiron nitride / mechanical alloying / electrolytic iron powder / carbonyl iron powder / NH_3 / ntiriding / oxidation / Sm_2Fe_<17>N_X / NH3 / Fe16N2 / Sm2Fe17NX / メカニカルグライディング / メカニカルアロング / 軟磁性材料 / 正方晶鉄 / 立方晶鉄
Research Abstract

Mechanical alloying (MA) in NH_3 has been applied to prepare iron-nitride where two different kinds of iron powders, i.e., electrolytic iron powder and carbonyl iron powder, were used as the starting materials. Nitriding has proceeded better in the latter than in the former. For example, 12at%N and 2.0at%O were contained in the specimen of the electrolytic iron powder after MA in NH_3 for 160h, and 11.5at%N and 2.7at%O in the specimen of the carbonyl iron powder after the same MA time. The MA process under higher pressure of NH_3 has shown an effect on preventing oxidation.
The specimen obtained by the above mentioned MA process showed a supersaturated bcc structure below 14-15at%N,and Fe_3N structure above 18-19at%N.Fe_<16>N_2 could not obtained by the MG process for the 11.1at%N specimen prepared by the MA process. Fe_4N,however, obtained by the annealing treatment.
The MA process in NH_3 has been also applied for the preparation of Sm_2Fe_<17>N_X specimen. The Sm_2Fe_<17>N_X specimen obtained by this process has been confirmed to show the ultra high coercivity higher than 2.0T.
This experiment would be continued to get the nano-composite magnetic materials composed of Fe_<16>N_2 and Sm_2Fe_<17>N_X.

Report

(3results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report

Research Products

(17results)

All Other

All Publications

  • [Publications] 井藤幹夫: "MG処理により作製されたSm_2Fe_<17>N_x粉末に対する作製条件の影響" 粉体および粉末冶金. 42. 156-160 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 真島一彦: "MG法により作製したSm_2Fe_<17>N_x粉末の磁気特性に影響を及ぼす諸因子" 粉体および粉末冶金. 42. 161-165 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 井藤幹夫: "メカニカルグラインディング法により作製されたSm_2Fe_<17>N_x粉末の磁気特性" 日本金属学会誌. 59. 666-672 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 井藤幹夫: "NH_3雰囲気中でのボールミルを用いたSm_2Fe_<17>N_x粉末の作製と磁気特性" 粉体および粉末冶金. 42. 1300-1304 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 井藤幹夫: "メカニカルグラインディング法により作製されたSm_2Fe_<17>N_x粉末の真空中熱処理による磁気特性の改善" 日本金属学会誌. 59. 1172-1177 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Ito, K.Majima, S.Katsuyam and H.Nagai: "Effect of Preparation Condition on Some Properties of Sm_2Fe_<17>N_X" Journal of the Powder and Powder Metallurgy. 43-2. 156-160 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] K.Majima, M.Ito, T.Takeda, S.Katsuyama and H.Nagai: "A Study of the Factors Influencing the Magnetic Properties of Sm_2Fe_<17>N_X Powders Prepared by MG Process" Journal of the Powder and Powder Metallurgy. 43-2. 161-165 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Ito, K.Majima, S.Katsuyam and H.Nagai: "Magnetic Properties of Sm2Fe17NX Powders Prepared by Mechanical Grinding" Journal of the Japan Institute of Metals. 59-2. 666-672 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Ito, K.Majima, S.Katsuyam and H.Nagai: "Preparation of Sm2Fe17NX Powders Powders with Ball Mill in NH3 and Their Magnetic Properties" Journal of the Powder and Powder Metallurgy. 42-11. 1300-1304 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Ito, K.Majima, S.Katsuyama and H.Nagai: "Improvement of Magnetic Properties of Mechanically Ground Sm2Fe17NX Powders by Vacuum Heat Treatment" Journal of the Japan Institute of Metals. 59-11. 1172-1177 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 井藤幹夫: "MG処理により作製されたSm2Fe17NX粉末に対する作製条件の影響" 粉体および粉未冶金. 42. 156-160 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 真島一彦: "MG法により作製したSm2Fe17NX粉末の磁気特性に及ぼす諸因子" 粉体および粉末冶金. 42. 161-165 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 井藤幹夫: "メカニカルグラインディング法により作製されたSm2Fe17NX粉末の磁気特性" 日本金属学会誌. 59. 666-672 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 真島一彦: "MA法による微細結晶粒を有するFe_3B+Nd_2Fe_<14>B粉末の作製と磁気特性" 粉体および粉末治金. 41巻. 1320-1324 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 真島一彦: "MG法により作製されたNd-Fe-B系粉末の磁気特性に及ぼす酸素量の影響" 粉体および粉末治金. 41巻. 1325-1330 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 井藤幹夫: "MG法により作製されたSm_1Fe_<17>Nx粉末の磁気特性に及ぼす熱処理条件の影響" 粉体および粉末治金. 41巻. 544-548 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 井藤幹夫: "ArおよびNH_3中でのMG処理により作製されたSm_2Fe_<17>Nx粉末の窒化過程と磁気特性" 粉体および粉末治金. 41巻. 549-553 (1994)

    • Related Report
      1994 Annual Research Report

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Published : 1994-04-01   Modified : 2016-04-21  

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