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MECHANO-ELECTROCHEMISTRY OF MICRO-SURFACE AREA OF MATERIALS

Research Project

Project/Area Number 09305047
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Material processing/treatments
Research InstitutionHOKKAIDO UNIVERSITY

Principal Investigator

SEO Masahiro  Grad. School of Eng., Hokkaido Univ., Prof., 大学院・工学研究科, 教授 (20002016)

Co-Investigator(Kenkyū-buntansha) FUSHIMI Koji  Grad. School of Eng., Hokkaido Univ., Inst., 大学院・工学研究科, 助手 (20271645)
AZUMI Kazuhisa  Grad. School of Eng., Hokkaido Univ., Asso. Prof., 大学院・工学研究科, 助教授 (60175875)
Project Period (FY) 1997 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥30,400,000 (Direct Cost: ¥30,400,000)
Fiscal Year 1999: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1998: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1997: ¥26,800,000 (Direct Cost: ¥26,800,000)
KeywordsMechano-electrochemistry / Nanoindentation / Passive Film / Load-depth Curv / Mechanical Property / Iron / Titanium / Anodic Oxide fil / メカノエレクトロケシストリ / 荷重-深さ曲線 / 荷重-変位曲線 / 電気化学測定 / 硬度
Research Abstract

Nanoindentation tests were performed for the single crystal iron (100) surfaces electrochemically controlled in pH 8.4 borate solution to measure the load-depth curves from which the mechanical properties such as hardness and elastic modulus of the iron surfaces were evaluted to obtain the fundamental knowledge for estabilshment of mechano-electrochemistry. The hardness of the iron surfaces was fluctuated depending on the position of nano-surface area. The average value of hardness, however, took a minimum at 0.25 V in the passive potential region. At the potential above 0.25 v, the average hardness increased linearly with increasing the potential, I.e., the thickness of passive film. The hardness of film itself could be separated from that of the substrate iron by using the linear relation between average hardness and film thickness. Moreover, the nanoindentation tests were performed for the single crystal iron (100) and (110) surfaces passivated at 1.0 V in pH 8.4 borate solution to … More investigate the depedence of hardness on crystal orientation of the surface. However, no significant differences in hardness was observed between single crystal iron (100) and (110) surfaces.
The hardness of the polycrystalline titanium surfaces subjected to anodic oxidation in various electrolyte solutions was measured as a function of formation potential of anodic oxide film. The hardness increased with increasing the film formation potential up to 8 V. The hardness decreased rapidly above 8 V at which the local breakdown of the film would take place. Moreover, the largest hardness was observed for the titanium surfaces subjected to anodic oxidation in sulfuric acid. The stresses generated in the anodic oxide film on titanium were measured by a laser-beam deflection method to investigate the relation between stress in the film and hardness. The largest compressive stresses were generated in anodic oxide film on titanium in sulfuric acid. Therfore, it is found that there is a good correlation between compressive stress and hardness. The partial release of the compressive stresses were observed at the potential above 8 V at which the local breakdown of anodic oxide film took place. The rapid decrease in hardness at the potential above 8 V was ascribed to the partial release of compressive stress ue to local breakdown of anodic oxide film. Less

Report

(4 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • 1997 Annual Research Report
  • Research Products

    (19 results)

All Other

All Publications (19 results)

  • [Publications] 糠谷文泰: "アノード酸化物皮膜で覆われたチタン表面のナノインデンテーション"材料と環境'99講演集. 55-56 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M.Seo: "Nano-mechano-electrochemistry of iron (100) surface in solution"J.Electroanal.Chem.. 473. 49-53 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M.Seo: "In-situ Nano indentation of a Single Crystal Iron (100) Surface Possivated in pH 8,4 Bovic-Borate Solution"Electrochem.Soc.Proceedings. 98・17. 1-10 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 瀬尾眞浩: "チタンアノード酸化物皮膜の応力測定"第46回材料と環境討論会講演集. 43-46 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M.Seo: "Nano indentation of the Titanium Surfaces Covered with Anodic Oxide Films"Proc.8th International Symposium on Passivity of Metals and Semiconductors. (印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 瀬尾眞浩: "アノード酸化物皮膜の応力"表面技術. 51・4. 1-7 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] F. Nukaya, K. Azumi, M. Seo: "Nano-indentation of Ti Surface Covered with Anodic Oxide Film."Proc Zairyo-to-Kankyo. 55-56 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M. Seo, M. Chiba, K. Suzuki: "Nano-mechano-electrochemistry of Iron (100) Surface in Solution."J. Electroanal Chem.. 473. 49-53 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M. Seo, M. Chiba, K. Suzuki: "In-situ Nanoindentation of a Single Crystal Iron (100) Surface Passivated in pH 8.4 Boric-Borate Solution."Proc. ECS.. Vol.98-17. 1-10 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M Seo, K Ueno, K Fushimi, H Habazaki: "Stress Measurement of Ti Anodic Oxide Films."Proc. 46th Japan Conference on Materials and Environments. 43-46 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M. Seo, F. Nukaya, K. Azumi: "Nanoindentation of the Titanium Surfaces Covered with Anodic Oxide Films."Proc. 8th Intern. Symp. On Passivity of Metals and Semiconductor. (in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M. Seo, K. Ueno: "Stresses in Anodic Oxide Films."J. Surf. Finish. Soc. Of Japan. 51(4)(in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 糠谷文泰: "アノード酸化物皮膜で覆われたチタン表面のナノインデンテーション"材料と環境'99講演集. 55-56 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] M. Seo: "Nano-mechano-electrochemistry of iron (100) surface in solution"J. Electroanal. Chem.. 473. 49-53 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] M. Seo: "In-situ Nanoindentation of a Single Crystal Iron (100) Surface Passivated in pH 8.4 Boric-Borate Solution"Electrochem. Soc. Proc.. 98・17. 1-10 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 瀬尾眞浩: "チタンアノード酸化物皮膜の応力測定"第46回材料と環境討論会講演集. 43-46 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 瀬尾眞浩: "アノード酸化皮膜の応力"表面技術. 51・4. 1-7 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] M. Seo: "Nanoindentation of the Titanium Surfaces Covered with Anodic Oxide Films"Proc. 8th International Symposium on Passivity. (印刷中).

    • Related Report
      1999 Annual Research Report
  • [Publications] Masahiro Seo: "In-situ Nano indentation of a Single Crystal Iron (100) surface Passivated in pH8.4 Boric-Borate Solution" Proceedings of Electrochemical Society. (in press). (1999)

    • Related Report
      1998 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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