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Effect of light irradiation on RT plastic deformation of inorganic single crystals

Research Project

Project/Area Number 21K20484
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0401:Materials engineering, chemical engineering, and related fields
Research InstitutionNagoya University

Principal Investigator

OGURA Yu  名古屋大学, 工学研究科, 助教 (70908152)

Project Period (FY) 2021-08-30 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords転位 / 光 / 無機半導体 / 結晶塑性 / 転位物性
Outline of Research at the Start

無機半導体中の転位は,局所的な組成の偏りに起因して,しばしば正もしくは負に帯電することが知られている.その結果,転位は自由電子やホールと相互作用を生じうる.しかしながら,そうした相互作用が結晶の変形特性(転位の運動性)や転位機能に及ぼす影響については不明な点が多い.そこで本研究では,無機半導体結晶について光環境制御下における機械的変形試験を実施し,変形特性における光環境効果を調査する.また,転位を導入した結晶について物性測定を行い,転位機能の評価を実施する.

Outline of Final Research Achievements

Dislocations in inorganic single crystals have characteristic atomic and electronic structures at their cores, and consequently can interact with photo-excited carriers. Due to the interaction, the plastic deformation behavior can be affected by light irradiation. In this study, magnesium oxide (MgO) single crystals were deformed at room temperature under controlled light conditions. Then, it was revealed that MgO crystals exhibit positive photoplastic effect, increase in flow stress by light irradiation.

Academic Significance and Societal Importance of the Research Achievements

光塑性効果に関する研究は,これまで主にII-VI族化合物半導体を対象に行われてきた.本研究は,光塑性効果がII-VI族化合物半導体以外の材料においても生じる可能性を示唆している.本研究を足掛かりとして,より広範な材料に適用可能な基礎学理が構築されることによって,光を利用した新奇材料加工・材料製造技術の創成が期待できる.

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (3 results)

All 2023 2022 2021

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (2 results)

  • [Journal Article] Room-temperature plastic deformation modes of cubic ZnS crystals2023

    • Author(s)
      Kitou Shunsuke、Oshima Yu、Nakamura Atsutomo、Matsunaga Katsuyuki、Sawa Hiroshi
    • Journal Title

      Acta Materialia

      Volume: 247 Pages: 118738-118738

    • DOI

      10.1016/j.actamat.2023.118738

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Presentation] 閃亜鉛鉱型ZnS単結晶における室温塑性変形機構2022

    • Author(s)
      大島優,鬼頭俊介, 中村篤智, 横井達矢, 澤博,松永克志
    • Organizer
      日本金属学会 2022年秋期大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ZnS結晶の塑性変形挙動における光環境効果2021

    • Author(s)
      大島優
    • Organizer
      第15回物性科学領域横断研究会
    • Related Report
      2021 Research-status Report

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Published: 2021-10-22   Modified: 2024-01-30  

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