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Direct observation of supercooled liquid state in metallic glasses

Research Project

Project/Area Number 24656400
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Structural/Functional materials
Research InstitutionTohoku University

Principal Investigator

HIRATA Akihiko  東北大学, 原子分子材料科学高等研究機構, 准教授 (90350488)

Project Period (FY) 2012-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords金属ガラス / 過冷却液体 / 電子顕微鏡 / 原子構造 / 電子回折 / ガラス転移
Outline of Final Research Achievements

We have conducted an in-situ heating experiment of the supercooled liquid state to clarify a mechanism of the glass formation process. When the in-situ observation of a Pd-based metallic glass was carried out in a transmission electron microscope, it was found that striation contrasts appeared around the glass transition temperature (Tg) due to softening of the sample and crystallization occurred at the temperature 20K higher than Tg. In this study we could not gain the information of local atomic structures due to a large drift of the sample, but we indicated possibility of the experiment by using some advanced camera.

Report

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

    (13 results)

All 2015 2014 2013 2012

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Acknowledgement Compliant: 1 results) Presentation (10 results) (of which Invited: 7 results)

  • [Journal Article] Depth-resolution imaging of crystalline nanoclusters attached on and embedded in amorphous films using aberration-corrected TEM2015

    • Author(s)
      J. Yamasaki, M. Mori, Masayuki, A. Hirata, Y. Hirotsu, N. Tanaka
    • Journal Title

      Ultramicroscopy

      Volume: 151 Pages: 224-231

    • DOI

      10.1016/j.ultramic.2014.11.005

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Angstrom-beam electron diffraction of amorphous materials2014

    • Author(s)
      A. Hirata, M.W. Chen
    • Journal Title

      Journal of Non-Crystalline Solids

      Volume: 383 Pages: 52-58

    • DOI

      10.1016/j.jnoncrysol.2013.03.010

    • Related Report
      2014 Annual Research Report 2013 Research-status Report 2012 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Geometric frustration of icosahedron in metallic glasses2013

    • Author(s)
      A.Hirata, L. J. Kang, T. Fujita, B. Klumov, K. Matsue, M. Kotani, A. R. Yavari, M. W. Chen
    • Journal Title

      Science

      Volume: 341巻No. 6144 Issue: 6144 Pages: 376-379

    • DOI

      10.1126/science.1232450

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Presentation] オングストロームビーム電子回折による金属ガラスの局所構造解析2014

    • Author(s)
      平田秋彦
    • Organizer
      顕微鏡学会・次世代顕微サイ
    • Place of Presentation
      淡路夢舞台国際会議場
    • Year and Date
      2014-11-04
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] 電子線回折を用いた金属ガラスの局所構造解析2014

    • Author(s)
      平田秋彦、藤田武志、陳明偉、弘津禎彦
    • Organizer
      日本金属学会2014
    • Place of Presentation
      名古屋大学
    • Year and Date
      2014-09-24 – 2014-09-26
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] オングストロームビーム電子回折による金属ガラスの局所構造解析2014

    • Author(s)
      平田秋彦、藤田武志、陳明偉
    • Organizer
      JAIST-SPring-8 連携講座シンポジウム
    • Place of Presentation
      北陸先端科学技術大学院大学
    • Related Report
      2013 Research-status Report
    • Invited
  • [Presentation] STEM電子回折を用いた金属ガラスの局所構造解析2014

    • Author(s)
      平田秋彦、藤田武志、陳明偉
    • Organizer
      日本顕微鏡学会 第38回関東支部講演会
    • Place of Presentation
      日本女子大学
    • Related Report
      2013 Research-status Report
    • Invited
  • [Presentation] オングストロームビーム電子回折による非晶質物質の局所構造解析2014

    • Author(s)
      平田秋彦、藤田武志、陳明偉
    • Organizer
      放射光・中性子によるセラミックス原子相関解析研究会
    • Place of Presentation
      慶応義塾大学
    • Related Report
      2013 Research-status Report
    • Invited
  • [Presentation] 電子回折を用いたZr基金属ガラスの局所構造解析2013

    • Author(s)
      平田秋彦、藤田武志、陳明偉、弘津禎彦
    • Organizer
      日本顕微鏡学会第69回学術講演会
    • Place of Presentation
      大阪エキスポパーク
    • Related Report
      2013 Research-status Report
  • [Presentation] 電子回折マッピング法を用いた金属ガラスの中範囲規則構造の検討2013

    • Author(s)
      平田秋彦、藤田武志、陳明偉、弘津禎彦、西山信行
    • Organizer
      日本金属学会 2013年 秋期講演大会
    • Place of Presentation
      金沢大学
    • Related Report
      2013 Research-status Report
  • [Presentation] STEMを用いたオングストロームビーム電子回折法による金属ガラスの局所構造解析2012

    • Author(s)
      平田 秋彦、管 鵬飛、藤田 武志、陳 明偉、弘津 禎彦
    • Organizer
      日本顕微鏡学会 学術講演会
    • Place of Presentation
      つくば
    • Related Report
      2012 Research-status Report
    • Invited
  • [Presentation] 金属ガラスの局所構造から得られた電子回折図形の特徴と解釈2012

    • Author(s)
      平田 秋彦、藤田 武志、陳 明偉、弘津 禎彦
    • Organizer
      日本金属学会 秋期大会
    • Place of Presentation
      愛媛大学
    • Related Report
      2012 Research-status Report
  • [Presentation] Direct observation of local atomic order in a metallic glass2012

    • Author(s)
      A. Hirata, P. F. Guan, T. Fujita, M. W. Chen
    • Organizer
      IUMRS-ICA-2012
    • Place of Presentation
      韓国 プサン
    • Related Report
      2012 Research-status Report
    • Invited

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Published: 2013-05-31   Modified: 2019-07-29  

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