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Synthesis of metastable Fe_3C,Co_3C and Ni_3C by mechanical alloying

Research Project

Project/Area Number 08650764
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Physical properties of metals
Research InstitutionUniversity of Tokyo

Principal Investigator

TOKUMITSU Kazuto  Tokyo University, Shool of Engineering, Research Associate, 大学院・工学系研究科, 助手 (20180143)

Co-Investigator(Kenkyū-buntansha) INO Hiromitsu  Hosei University, Faculty of Engineering, Professor, 工学部, 教授 (20029466)
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: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1996: ¥1,900,000 (Direct Cost: ¥1,900,000)
KeywordsMechanical alloying / Ball milling / Solid state reaction / Metastable phase / Metal carbie / Iron / Cobalt / Nickel
Research Abstract

Metastable Fe_3C,Co_3C and Ni_3C could be obtained by mechanical alloying of metal Fe, Co and Ni powders with carbon powders at room temperature. Their crystal structures, thermal stabilities and magnetic properties were evaluated by X-ray diffraction (XRD), defferential scanning calorimetory (DSC) and vibration sample magnetometer (VSM).
These metastable metal carbides have not been obtaioned by conventional methods, so their presence are not discribed in equilibrium phase diagrams. Mechanical alloying method enabled us the preparation of metastable phases, because this is a method to synthesize any power samples at room temperature.
By XRD analysis, it is concluded that Fe_3C is orthothombic, Co_3C transition type from orthorhomibic to hcp, Ni_3C hcp structure, which suggested that the structure of these carbides were governed by the state of 3d electrons of these metal elements{(3d)^6for fe, (3d)^7for Co and (3d)^8for Ni}. The decomposition temperatures were 1227゚C,468゚C respectively. Saturation magnetizations were 218emu/g, 1.98emu/g and 0.45emu/g. The latter two were not ferromagnetic for M-T mesurements, which it were not fitted by Curie Weiss rule.

Report

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

    (10 results)

All Other

All Publications (10 results)

  • [Publications] K.Tokumitsu: "Synthesis of metastable hcp Co_3C by mechanical alloying method" J.Alloys & Compounds.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Tokumitsu: "Synthesis of metastable Fe_3C,Co_3C and Ni_3C by mechanical alloying" Matirials Scienc Forum. 235. 127-132 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] C.Zhou and K.Tokumitsu: "Bulk mechanical Alloying of Co-Cu" Ceramic Eng.&Science. 18. 99-103 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Tokumitsu: "Synthesis of metastable hcp Co_3C by mechanical alloying method" J.Alloys & Compounds.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Tokumitsu: "Synthesis of metastable Fe_3C,Co_3C and Ni_3C by mechanical alloying" Matreials Sci.Forum. 235. 127-132 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] C.Zhou and K.Tokumitsu: "Bulk mechanical alloying of Co-Cu" Ceramic Eng.& Sci. 18. 99-103 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Tokumitsu: "Synthesis of metastable hcp Co_3C by mechanical alloying method" J.Alloys & Compounds.

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Tokumitsu: "Synthesis of metastable Fe_3C,Co_3C and Ni_3C by mechanical alloying" Materials Scienc Forum. 235. 127-132 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] C.Zhou and K.Tokumitsu: "Bulk mechanical Alloying of Co-Cu" Ceramic Eng.& Science. 18. 99-103 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 徳満和人: "メカニカルアロイング法の少し変った試み" トライボロジスト. 41・2. 22-27 (1996)

    • Related Report
      1996 Annual Research Report

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

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