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"Transformation - Induced Vacancy" - A New Vacancy Formation Mechanism and Its Function in Materials -

Research Project

Project/Area Number 24246105
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Physical properties of metals
Research InstitutionKyoto University

Principal Investigator

SHIRAI Yasuharu  京都大学, 工学(系)研究科(研究院), 教授 (20154354)

Co-Investigator(Kenkyū-buntansha) INOUE Koji  京都大学, 工学(系)研究科(研究院), 講師 (50344718)
SUGITA Kazuki  京都大学, 工学(系)研究科(研究院), 助教 (30517470)
Project Period (FY) 2012-05-31 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥28,860,000 (Direct Cost: ¥22,200,000、Indirect Cost: ¥6,660,000)
Fiscal Year 2014: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2013: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
Fiscal Year 2012: ¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Keywords原子空孔 / 相変態 / 格子欠陥 / 陽電子消滅 / 時効硬化 / 内部酸化 / アルミニウム合金 / 銀合金 / Ag合金 / 空孔形成 / 析出 / 金属材料
Outline of Final Research Achievements

In order to prove the vacancy formation by phase transformation, positron annihilation techniques were applied to detect the vacancy formation for aging of aluminum alloys and for internal oxidation process of silver alloys. It was shown that vacancies are introduced during the the precipitation of β”phase in aged aluminum alloys, and in case of oxidized silver alloys vacancy and vacancy-clusters are formed during internal oxidation. These results support the new vacancy formation mechanism by phase transformation.

Report

(4 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Annual Research Report
  • 2012 Annual Research Report
  • Research Products

    (3 results)

All 2015 2014 Other

All Presentation (3 results)

  • [Presentation] Ag-Al合金の内部酸化に伴う格子欠陥の形成2015

    • Author(s)
      冨岡亮輔, 杉田一樹, 白井泰治
    • Organizer
      日本物理学会 第70回年次大会
    • Place of Presentation
      早稲田大学
    • Year and Date
      2015-03-21 – 2015-03-24
    • Related Report
      2014 Annual Research Report
  • [Presentation] Ag基希薄合金の内部酸化に伴う相変態誘起空孔の形成2014

    • Author(s)
      冨岡亮輔, 新貝康晴, 杉田一樹, 白井泰治
    • Organizer
      日本金属学会2014年秋期(第155回)講演大会
    • Place of Presentation
      名古屋大学
    • Year and Date
      2014-09-24 – 2014-09-26
    • Related Report
      2014 Annual Research Report
  • [Presentation] Al-Mg-Si系合金におけるβ”相形成時に導入される空孔挙動観察

    • Author(s)
      井上耕治
    • Organizer
      京都大学原子炉実験所専門研究会『陽電子科学とその理工学への応用』
    • Place of Presentation
      京都大学原子炉実験所
    • Related Report
      2012 Annual Research Report

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Published: 2012-11-27   Modified: 2019-07-29  

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