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2002 Fiscal Year Final Research Report Summary

Powdering limit of hydrogen absorbing intermetallic compounds

Research Project

Project/Area Number 12305046
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Structural/Functional materials
Research InstitutionKyoto University

Principal Investigator

YAMAGUCHI Masaharu  Kyoto Univ., Fac. Eng., Professor, 工学研究科, 教授 (90029108)

Co-Investigator(Kenkyū-buntansha) ITO Kazuhiro  Kyoto Univ., Fac. Eng., Research Associate, 工学研究科, 助手 (60303856)
TANAKA Katsushi  Kagawa Univ. Fac. Eng., Associate Professor, 工学部, 助教授 (30236575)
Project Period (FY) 2000 – 2002
KeywordsHydrogen absorption / Ti_3Al / Ti-Al-Nb alloys / microstructure / microstructure control / Mg-Ca-Ni alloys
Research Abstract

Mechanisms of the reversible hydrogen absorption and desorption in Ti_3Al-base alloys was studied by means of pressure-composition isotherm measurements and microscopy observations before and after hydrogen absorption on specimens subject to heat treatment and cold rolling. The alpha-hydride to beta-hydride phase transformation in the Ti_3Al-base alloys occurs at a very low pressure and is reversible under normal conditions. However, the transformation between beta and gamma hydrides can be made reversible if the specimen is heat treated so that it contains O-phase in its microstructure or is appropriately deformed by cold rolling. The beneficial effects of O-phase on hydrogen absorption/desorption were demonstrated in three Ti-AT-Nb alloys with compositions in the vicinity of Ti_2NbAl. The beneficial effects are found to be related to the structure and strain field of O-phase rather than the interface between the O-phase and matrix. Their hydrogen absorption and desorption properties are improved when they are mildly deformed. Microstructure observations show that the beta and gamma hydride transformation occurs in a way very similar to the martensitic transformation and can be analyzed within the frame work of the martensitic transformation. The lattice shear deformation is accomplished by a high density of screw dislocations in the transformed laths. Such screw dislocations can be introduced by cold rolling.
The hydrogen absorption/desorption properties of other intermetallic materials may be expected to be improved similarly to Ti_3Al-base alloys. Thus, the hydrogen absorption and desorption of Mg-Ca-Ni alloys, which absorb hydrogen easily and form a very stable hydride, was investigated. However, we have not succeeded in enhancing their hydrogen absorption and desorption properties yet. Further work is needed to clarify the reason for this.

  • Research Products

    (34 results)

All Other

All Publications (34 results)

  • [Publications] T.Yamamoto, H.Inui, M.Yamaguchi: "Deformation of LaNi_5 by Uniaxial Compression and Hydrogenation"Intermetallics. 9. 987-991 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] L.T.Zhang, K.Ito, V.K.Vasudevan, M.Yamaguchi: "Beneficial effects of O-Phase on the Hydrogen Absorption of Ti-Al-Nb Alloys"Intermetallics. 9. 1045-1052 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Hirota, T.Yamamoto, H.Inui, M.Yamaguchi: "Microstructure Evolution During Hydrogen Absorption-Desorption Cycles in Some Intermetallic Compounds"Journal of Materials Processing & Technology. 117. 1-14 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Tatsumi, I.Tanaka, H.Inui, K.Tanaka, M.Yamaguchi, H.Adachi: "Atomic Structures and Energetics of LaNi_5-H Solid Solution and Hydrides"Physical Review B. 184105. 1-10 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] L.T.Zhang, K.Ito, V.K.Vasudevan, M.Yamaguchi: "Hydrogen Absorption and Desorption in a B2 Single-Phase Ti-22Al-27Nb Alloy Before and After Deformation"Acta Mater. 49. 751-758 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Ito, L.T.Zhang, V.K.Vasudevan, M.Yamaguchi: "Multiphase and Microstructure Effects on the Hydrogen Absorption/Desorption Behavior of a Ti-22Al-27Nb Alloy"Acta Mater. 49. 963-972 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Inui, K.Ito, L.Zhang, T.Yamamoto, M.Yamaguchi: "Effects of Lattice Defects and Microstructures on Hydrogen Absorption/Desorption Properties in Some Intermetallic Compounds"Proc of Advanced Materials X (ASM) 2001 USA. 131-140 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Ito, Y.Okabe, L.T.Zhang, M.Yamaguchi: "Reversible Hydrogen Absorption/Desorption and Related Phase Transformation in a Ti_3Al Alloy with the Stoichiometry Composition"Acta Mater.. 50. (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Inui, T.Yamamoto, M.Hirota, M.Yamaguchi: "Lattice Defects Introduced During Hydrogen Absorption-Desorption Cycles and Their Effects on PCT Characteristics in Some Intermetallic Compounds"J.of Alloys and Compounds. 330-332. 117-124 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Ito, L.T.Zhang, V.K.Vasudevan, M.Yamaguchi: "Hydrogen Absorption/Desorption Behavior of Ti-22Al-27Nb Alloys with b_0 Single-Phase and β/o Two-Phase Microtructure"Mater.Sci. & Eng. A329-331. 356-361 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] L.T.Zhang, K.Ito, V.K.Vasudevan, M.Yamaguchi: "Effects of Cold-Rolling on the Hydrogen Absorption/Desorption Behavior of Ti-22Al-27Nb Alloys"Mater.Sci. & Eng. A329-331. 362-366 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Yamamoto, H.Inui, M.Yamaguchi: "Effects of Lattice Defects on Hydrogen Absorption-Desorption Pressures in LaNi_5-Based Alloys"Mater.Sci. & Eng. A329-33. 367-371 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Inui, T.Yamamoto, M.Hirota, T.Matsuura, T.Hirato, M.Yamaguchi: "Preparation of Thin Foils for Transmission Electron Microscopy from Hydrogenated Intermetallic Compounds"Journal of Alloys and Compounds. (in press).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Tatsumi, I.Tanaka, H.Inui, M.Yamaguchi, H.Adachi: "Elastic Constants and Chemical Bonding of LaNi_5 and LaNi_5H_7 by First Principles Calculations"Acta Materialia. (submitted).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Matsuura, T.Yamamoto, H.Inui, M.Yamaguchi: "Microstructure-Hydrogen Sorption Property Relationships in TiMn_2-Based Alloys"Intermetallics. (submitted).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Yamamoto, H.Inui, M.Yamaguchi: "Influence of Lattice Defects on Hydrogen Absorption-Desorption Pressures in LaNi_5"Acta Materialia. (submitted).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Inui, H.Shintaku, T.Yamamoto, M.Yamaguchi: "Plastic Deformation of Single and Polycrystalline LaNi_5"Intermetallics. (submitted).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T. Yamamoto, H. Inui and M. Yamaguchi: "Deformation of LaNi_5 by Uniaxial Compression and Hydrogenation"Intermetallics. 9. 987-991 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] L. T Zhang, K. Ito, V. K. Vasudevm and M. Yamagochi: "Beneficial effects of O-Phase on the Hydrogen Absorpton of Ti-Al-Nb Alloys"Intermetallics. 9. 1045-1052 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Hirota, T. Yamamoto, H. Inui and M. Yamaguchi: "Microstructure Evolution During Hydrogen Absorption-Desorption Cycles in Some Intermetallic Compounds"Journal of Materials Processing & Technology. 117. 1-14 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Tatsumi, I. Tanaka, H. Inui, K. Tanaka, M. Yamaguchi and H. Adachi: "Atomic Structures and Energetics of LaNi_5-H Solid Solution and Hydrides"Physical Review B. 184105. 1-10 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] L. T. Zhang, K. Ito, V. K. Vasudevan and M. Yamaguchi: "Hydrogen Absorption and Desorption in a B2 Single-Phase Ti-22Al-27Nb Alloy Before and After Deformation"Acta Mater.. 49. 751-758 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Ito, L. T. Zhang, V. K. Vasudevan and M. Yamaguchi: "Multiphase and Microstructure Effects on the Hydrogen Absorption/Desorption Behavior of a IN-22Al-27Nb Alloy"Acta Mater.. 49. 963-972 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Inui, K. Ito, L. Zhang, T. Yamamoto and M. Ymaguchi: "Effects of Lattice Defects and Microstructures on Hydrogen Absorption/Desorption Properties in Some Intermetallic Compounds"Proc of Advanced Materials X (ASM) 2001 USA. 131-140 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Ito, Y Gibe, L. T. Zhang and M. Yamaguchi: "Reversible Hydrogen Absorption/Desorption and Related Phase Ttansformation in a Ti_3Al Alloy with the Stoichiometry Composition"Acta Mater.. 50. 4901-4912 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Inui, T, Yamamoto, M. Hirota and M. Yamaguchi: "Lattice Defects Introduced During Hydrogen Absorption-Desorption Cycles and Their Effects on PCT Characteristics in Some Intermetallic Compounds"J. of Alloys. and Compounds. 330-332. 117-124 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Ito, L. T., Zhang, V. K. Vasudevan and M. Yamaguchi: "Hydrogen Absorption/Desorption Behavior of Ti-22Al-27Nb Alloys with b_0 Single-Phase and β/o Two-Phase Microhcture"Mater. Sci. & Eng.. A329-331. 356-361 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] L. T. Zhang, K. Ito, V. K. Vasudevan and M. Yamaguchi: "Effects of Cold-Rolling on the Hydrogen Absorption/Desorption Behavior of Ti-22Al-27Nb Alloys"Mater. Sci. & Eng.. A329-331. 362-366 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Yamamoto, H. Inui and M. Yamaguchi: "Effects of Lattice Defects on Hydrogen Absorption-Desorption Pressures in LaNi_5-Based Alloys"Mater. Sci. & Eng.. A329-331. 367-371 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Inui, T. Yamamoto, M. Hirota, T. Matsuura, T. Hirato and M. Yamaguchi: "Preparation of Thin Foils for Transmission Electron Microscopy from Hydrogenated Intermetallic Compounds"Journal of Alloys and Compounds. in press.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Tatsumi, I. Tannin, H, Inui, M. Yamaguchi and H. Adachi: "Elastic Constants and Chemical Bonding of LaNi_5 and LaNi_5H_7 by First Principles Calculations"Acta Materialia. submitted. (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Matsuura, T. Yamamoto, H. Inui and M. Yamaguchi: "Microstructure-Hydrogen Sorption Property Relationships in TiMn_2-Based Alloys"Intermetallics. submitted. (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Yamamoto, H. Inui and M. Yamaguchi: "Influence of Lattice Defects on Hydrogen Absorption-Desorption Pressures in LaNi_5"Acta Materialia. submitted. (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Inui, H, Shintaku, T. Yamamoto and M. Yamaguchi: "Plastic Deformation of Single and Polycrystalline LaNi_5"Intermetallcs. submitted. (2002)

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

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Published: 2004-04-14  

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