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1995 Fiscal Year Final Research Report Summary

Production of Non-Equilibrium Transition Metal Fine Particles by Mechanical and Chemical Fragmentation

Research Project

Project/Area Number 06452323
Research Category

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

Allocation TypeSingle-year Grants
Research Field Structural/Functional materials
Research InstitutionTohoku University

Principal Investigator

SUMIYAMA Kenji  Insutitute for Materials Research Associate Professor, 金属材料研究所, 助教授 (70101243)

Co-Investigator(Kenkyū-buntansha) KONNO Toyohiko  Institute for Materials Research Research Associate, 金属材料研究所, 助手 (90260447)
SAKURAI Masaki  Institute for Materials Research Research Associate, 金属材料研究所, 助手 (80235225)
SHIBUTA Kaoru  Institute for Materials Research Research, 金属材料研究所, 助手 (60183836)
KOMIYAMA Tomoaki  Institute for Materials Research Research Associate, 金属材料研究所, 助手 (90005926)
SUZUKI Kenji  Institute for Materials Research Professor, 金属材料研究所, 教授 (10005861)
Project Period (FY) 1994 – 1995
Keywordsmechanical milling / leaching / ultrasonic fragmentation / nonequilibrium phase / metal particle / magnetism / hydrogel / thermal analysis
Research Abstract

In this project, we tried to produce nonequilibrium metal and compound fine powders using the combined process of mechanical milling and chemical reaction, and observed their structures and magnetic properties. The following is the summary of our experimental results.
1) Combined Process of Mechanical Milling and Leaching
Nonequilibrium precursory particles of Ni-Al, Mn-Al, Ru-Al, Ni-Fe-Al and Cu-Fe-Al were produced using mechanical milling. The main portion of Al was leached out of these milled powders in basic solution. The X-ray diffraction measurements indicate that the nonequilibrium structures, bcc Ni, alpha-Mn, bcc Ru, bcc Ni-Fe and bcc Cu-Fe, retain even after leaching, where Cu-Fe powders are highly oxidized. The DSC traces of these powderes show a exothermic peak owing to nonequilibrium-to equilibrium-phase transformation. Magnetic measurements indicate that bcc Ni and bcc Ru are paramagnetic, while alpha-Mn and bcc Ni-Fe(25at%Fe) are ferromagnetic. These results clearly demons … More trate formation of nonequilibrium phases.
2) Enhanced Decomposion of Chemical Solution by Ultrasonic Irradiation
Pentacarbonyl, Fe(CO)_5 solutions in decane were irradiated using a high-intensity ultrasonic probe and sooty powders were obtained by filtereing and rinsing with dry pentane. The X-ray diffraction experiment show a halo pattern, indicating these powderes are amorphous-like. Magnetization of these powders is one order smaller than that of bulk Fe. This indicates insufficient decomposion of carbonyl solutions, being consistent with presence of C and O detected by the chemical analyzes.
3) Homogeneous Complex Formation in Mixed Hydrogel by Mechanical Milling
Processes of complex formation between alumina and titania hydrogels was verified by X-ray diffraction, DSC, NMR and EXAFS.The Knight shift and symmetric to asymmetric change in the of ^<27>Al as well as modification of Ti-K edge EXAFS sepctra clearly demonstratethe chemical bonding, Al-O-Ti is formed during the millig process. Less

  • Research Products

    (32 results)

All Other

All Publications (32 results)

  • [Publications] K. J. Kim: "Structure and Magnetic Properties of Fe_4N-Fe Alloys Produced by Mechanical Milling," J. Alloys and Compounds. 203. 169-176 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. J. Kim: "Formation of Nanocrystalline and Amorphous Phases in Cu_<80>P_<20>, Ni_<82>P_<18> and Cu_<87>Ni_<13> Mechanically Alloyed Systems," J. Non-Cryst. Solids. 168. 232-246 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S. A. Makhlouf: "Metastable bcc and Amorphous Ni Produced by Mechanical Alloying and Chemical Leaching," Mater. Sci. Eng.A181/182. 1184-1189 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. Sumiyama: "Non-Equilibrium Phase Formation and Valence Fluctuation in Immiscible Ce-Yb Alloys Produced by Mechanical Milling and Sputtering," Mater. Sci. Eng.A181/182. 1268-1271 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. J. Kim: "Martensitic Transformation of Mechanically Ground γ'-Fe_4N" Mater. Sci. Eng.A181/182. 1271-1276 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y. Xu: "Nanocrystalline B2 Type Ru_<40>Al_<60> and Ru Powders Produced by Mechanical Alloying and Leaching," Nano Structured Materials. 4. 437-444 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y. Kojima: "Comparison of Mechanical Complexation and Themal Behaviour of Metal, Oxide and Hydrogel Mixtures of the Al-Ti-O System," Int. J. Mechanochemistry and Mechanical Alloying. 1. 32-41 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. J. Kim: "Structure and Magnetic Properties of Mechanically Ground ε-Fe_<2.3>N" Jpn. J. Appl. Phys.33. 6539-6541 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M. S. El-Eskandarany: "Mechanism of Solid Gas Reaction for Formation of Metastable Niobium Nitride Alloy Powders by Reactive Ball Milling," J. Mat. Res.9. 2891-2898 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. J. Kim: "Ferromagnetic α-Mn-Type Mn-Al Alloys Produced by Mechanical Alloying," J. Alloys & Compounds. 217. 48-51 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M. S. El-Eskandarany: "Mechanically Assisted Solid State Hydrogenation for Formation of Nanocrystallne NiTiH_3 Alloy Powders," J. Alloys & Compounds. 218. 36-43 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. J. Kim: "Ferromagnetic α-Mn Type Mn-Al Alloys Produced by Mechanochemical Methods" J. Magn. & Magn. Mat.140-144. 49-50 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M. S. El-Eskandarany: "Mechanical Solid State Reaction for Synthesis of β-SiC Powders," J. Mat. Res.10. 659-667 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. Suzuki: "Control of Structure and Formation of Amorphous and Nonequilibrium Crystalline Materials by Mechanical Milling," Mat. Trans. JIM. 36. 188-197 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y. Kojima: "An NMR Study on the Mechanochemical Interaction between Al and Ti in Metals and Hydrogels," J. Alloys & Compounds. 227. 97-101 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y. Kojima: "Mechanics of Al and Titania Hydrogel Complex Formation via a Mechanical Route," to be published in J. Mat. Res.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.J.Kim, K.Sumiyama, H.Onodera and K.Suzuki: "Structure and Magnetic Properties of Fe_4N-Fe Alloys Produced by Mechanical Milling" J.Alloys and Compounds. 203. 169-176 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.J.Kim, K.Sumiyama and K.Suzuki: "Formation of Nanocrystalline and Amorphous Phases in Cu_<80>P_<20>, Ni_<82>P_<18> and Cu_<87>Ni_<13> Mechanically Alloyed Systems" J.Non-Cryst. Solids. 168. 232-240 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.A.Makhlouf, K.Sumiyama, E.Ivanov, H.Yamauchi, T.Hihara and K.Suzuki: "Metastable bcc and Amorphous Ni Produced by Mechanical Alloying and Chemical Leaching" Mater. Sci. Eng.A181/182. 1184-1189 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Sumiyama, K.Yanai, E.Ivanov, H.Yamauchi and K.Suzuki: "Non-Equilibrium Phase Formation and Valence Fluctuation in Immiscible Ce-Yb Alloys Produced by Mechanical Milling and Sputtering." Mater. Sci. Eng. A181/182. 1268-1271 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.J.Kim, K.Sumiyama, K.Shibata and K.Suzuki: "Martensitic Transformation of Mechanically Ground gamma'-Fe_4N" Mater. Sci. Eng.A181/182. 1272-1276 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Xu, S.A.Makhlouf, E.Ivanov, K.Wakoh, K.sumiyama and K.Suzuki: "Nanocrystalline B2 Type Ru_<40>Al_<60> and Ru Powders Produced by Mechanical Alloying and Leaching" NanoStructured Materials. 4. 437-444 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Kojima, T.Isobe, M.Senna, M.Sherif El-Eskandarany, K.Sumiyama and K.Suzuki: "Comparison of Mechanical Complexation and Thermal Behavior of Metal, Oxide and Hydrogel Mixtures of the Al-Ti-O System" Int. J.Mechanochemistry and Mechnical Alloying. 1. 32-41 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.J.Kim, K.Sumiyama, H.Onodera and K.Suzuki: "Structure and Magnetic Properties of Mechanically Ground epsilon-Fe_<2.3>N" Jpn. J.Appl. Phys.33. 6539-6541 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.S.El-Eskandarany, K.Sumiyama, K.Aoki, T.Masumato and K.Suzuki: "Mechanism of Solid Gas Reaction for Formation of Metastable Niobium Nitride Alloy Powders by Reactive Ball Milling" J.Mat.Res.9. 2891-2898 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.J.Kim, K.Sumiyama and K.Suzuki: "Ferromagnetic alpha-Mn-Type Mn-Al Alloys Produced by Mechanical Alloying" J.Alloys & Compounds. 217. 48-51 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.S.El-Eskandarany, H.A.Ahmed, K.Sumiyama and K.Suzuki: "Mechanically Assisted Solid State Hydrogenation for Formation of Nanocrystallne NiTiH_3 Alloy Powders" J.Alloys and Compounds. 218. 36-43 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.J.Kim, K.Sumiyama and K.Suzuki: "Ferromagnetic alpha-Mn Type Mn-Al Alloys Produced by Mechanochemical Methods" J.Magn. & Magn. Mat.140-144. 49-50 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.S.El-Eskandarany, K.Sumiyama and K.Suzuki: "Mechanical Solid State Reaction for Synthesis of beta-SiC Powders" J.Mat. Res.10. 659-667 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Suzuki and K.Sumiyama: "Control of Structure and Formation of Amorphous and Nonequilibrium Crystalline Materials by Mechanical Milling" Mat. Trans. JIM.36. 188-197 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Kojima, M.Senna, T.Shinohara, S.Ono, K.Sumiyama and K.Suzuki: "An NMR Study on the Mechanochemical Interaction between Al and Ti in Metals and Hydrogels" J.Alloys & Compounds. 227. 97-101 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Kojima, T.Isobe, M.Senna, T.Shinohara, S.Ono, K.Sumiyama and K.Suzuki: "Mechanics of Al and Titania Hydrogel Complex Formation via Mechanical Route" to be published in J.Mat. Res.

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1997-03-04  

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