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Development of Formation Technique and Chracterization of Nanocrystal Material form Ultra Fine Powder and MA Process

Research Project

Project/Area Number 02805085
Research Category

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

Allocation TypeSingle-year Grants
Research Field 金属加工(含鋳造)
Research InstitutionToyohashi University of Technology

Principal Investigator

UMEMOTO Minoru  Toyohashi University of Technology, Faculty of Engineering, Associate Professor, 工作センター, 助教授 (90111921)

Co-Investigator(Kenkyū-buntansha) FUKUMOTO Masahiro  Toyohashi University of Technology, Faculty of Engineering, Lecture, 工学部, 講師 (80173368)
OKANE Isao  Toyohashi University of Technology, Faculty of Engineering, Professor, 工学部, 教授 (80169127)
Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1991: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1990: ¥1,900,000 (Direct Cost: ¥1,900,000)
Keywordsnanocrystal / ultra fine powder / mechanical alloying / Cu / AIN / Sm_2Fe_<17> / NdMo_2Fe_<10> / rear earth nitride magnet / ナノクリスタル / 加圧焼結 / 銅 / パイプ圧延 / 混合超微粒子 / 微細結晶粒 / 粒成長
Research Abstract

The purpose of this research was to make nanocrystal materials using ultra fine powder or powder produced by mechanical alloying process and to develop functional material using the characteristics of nanocrystal. The main results obtained were as follows :
1. The particle size of the ultra fine powder produced by plasma-powder process was decreased with the decrease in chamber pressure and powder feeding rate.
2. It was shown to be possible to produce bulk materials with 50nm in grain size by sintering Ultra fine powder under the condition of low temperature and high pressure. Such bulk materials exhibited the hardness of 4 to 6 times higher than the regular materials with ordinary grain size. However, when sintering is carried out for the powder of a puremetal element, grain growth occurred even at low temperature.
3. When the mixed ultra fine powder of Cu and AIN was sintered, Ultra fine grained material with the stationally grain size of 0.4mum was produced. It was made clear that the pinning effect of the second phase which does not dissolve into matrix works well to stabilize the ultra fine grained structure.
4. When the powders of the binary alloys in Al-Ni-Ti system were mechanically alloyed, phases of amorphous, super saturated solid solution or intermetallic compounds were produced depending on the chemical compositions.
5. Mechanically alloyed powder was well sintered when the amount of exothermic heat was large. The grain size of Sintered material was extremely small and usually about 0.1mum.
6. By applying the grain refinement by MA, nitrides of Sm_2Fe_<17> and NdMo_2Fe_<10> were produced. The grain size of these materials were observed to be about 50nm and it was considered that the single magnetic domain structure was obtained. The coercivity of the above material was measured to be higher that those obtained by regular casting or repid solidification process.

Report

(3 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • Research Products

    (19 results)

All Other

All Publications (19 results)

  • [Publications] T.Itsukaichi,S.Shiga,K.Masuyama,M.Umemoto and I.Okane: "Consolidation of Mechanically Alloyed Al-Ni and Al-Ti Powders" Proc.of Int.Symp.on MA.Kyoto Japan.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 梅本 実,五日市 剛,岡根 功,水野 保敏,清宮 照夫,松井 一雄: "Sm_2Fe_<17>N_x化合物の保磁力に対する熱処理とMA条件の影響" 粉体および粉末冶金. 38. 957-962 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 志賀 信哉,五日市 剛,梅本 実,岡根 功: "Al_<25>Ni_<75>のメカニカルアロイングとその加圧焼結体の特性" 粉体および粉末冶金. 38. 963-966 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 福本 昌宏,八重樫 範明,島貫 誠,梅本 実,岡根 功: "MA法による金属/セラミックス複合粉末のプラズマ溶射" 溶接学会論文集.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 五日市 剛,細川 宗孝,伊賀 輝典,梅本 実,岡根 功: "Sm_2Fe_<17>N_x化合物の磁気特性に対するMAの効果" 粉体および粉体冶金.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] M.Udaka,K.Kawasaki,T.Yamazaki,M.Umemoto and I.Okane: "Formation and Characterization of Sintered Ultrafine-particles"

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Minoru Umemoto: "The formation and characterization of ultra fine grained material produced by the sintering of ultra fine powder." The report of ultra refinement of the grain size of iron and steel.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T. Itsukaichi, S. Shiga, K. Masuyama, M. Umemoto and I. Okane: "Consolidation of Mechanically alloyed Al-Ni and Al-Ti Powders." Proc. of Int. Symp. on MA.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] M. Umemoto, T. Itsukaichi, I. Okane, Y. Mizuno, T. Kiyomiya and K. Matsui: "Effect of Mechanical Alloying on the Magnetic Properties of Sm_2Fe_<17>Nx compound" J. Japan Soc. Powder and Powder Metallurgy. 38. 957-962 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] S. Shiga, T. Itsukaichi, M. Umemeoto and I. Okane: "Mechanical Alloying of Al_<25>Ni_<75> and Characterization of Hot Pressed Compacts" J. Japan Soc. Powder and Powder Metallurgy. 38. 963-366 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] S. Shiga, T. Ithukaichi, M. Umemoto and I. Okane: "Mechanical Alloying of Al_<50>Ni_<50> and Characterization of Hot Pressed Compacts" J. Japan Soc. Powder and Powder Metallurgy. 38. 967-970 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] S. Shiga, T. Ithukaichi, M. Umemoto and I. Okane: "Mechanical Alloying of Al_<75>Ni_<25> and Characterization of Hot Pressed Compacts" J. Japan Soc. Powder and Powder Metallurgy. 38. 971-975 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] S. Shiga, T. Norimatsu, T. Ithukaichi, M. Umemoto and I. Okane: "Mechanical Alloying and Mechanical Grinding of Al_<75>Ni_<25>" J. Japan Soc. Powder and Powder Metallurgy. 38. 976-980 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T.Itsukaichi,S.Shiga,K.Masuyama,M.Umemoto and I.Okane: "Consolidation of Mechanically Alloyed AlーTi and AlーNi Powders" Proc.of Int.Symp.on MA.Kyoto Japan.

    • Related Report
      1991 Annual Research Report
  • [Publications] 梅本 実,五日市 剛,岡根 功,水野 保敏,清宮 照夫,松井 一雄: "Sm_2Fe_<17>N_×化合物の保磁力に対する熱処理とMA条件の影響" 粉体および粉末治金. 38. 957-962 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 志賀 信哉,五日市 剛,梅本 実,岡根 功: "Al_<25>Ni_<75>のメカニカルアロイングとその加圧焼結体の特性" 粉体および粉末治金. 38. 963-966 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 福本 昌宏,八重樫 範明,島貫 誠,梅本 実,岡根 功: "MA法による金属/セラミックス複合粉末のプラズマ溶射" 溶接学会論文集.

    • Related Report
      1991 Annual Research Report
  • [Publications] 五日市 剛,細川 宗孝,伊賀 輝典,梅本 実,岡根 功: "Sm_2Fe_<17>N_×化合物の磁気特性に対するMAの効果" 粉体および粉体治金.

    • Related Report
      1991 Annual Research Report
  • [Publications] M.Udaka,K.kawasaki,T.Yamazaki,M.Umemoto and I.Okane: "Formation and Characterization of Sintered Ultrafineーparticles"

    • Related Report
      1991 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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