Room-temperature Deformation Behavior of Inorganic Semiconductor Materials Depending on External Fields

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  • Nakamura Atsutomo
    大阪大学大学院基礎工学研究科 科学技術振興機構さきがけ
  • Oshima Yu
    名古屋大学大学院工学研究科
  • Matsunaga Katsuyuki
    名古屋大学大学院工学研究科 一般財団法人ファインセラミックスセンター

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Other Title
  • 外部場に伴う無機半導体材料の室温塑性変形挙動の変化
  • ガイブジョウ ニ トモナウ ムキ ハンドウタイ ザイリョウ ノ シツオン ソセイ ヘンケイ キョドウ ノ ヘンカ

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Abstract

<p>In recent years, it was reported that semiconductor materials, which were regarded to be brittle, can exhibit high plasticity even at room temperature. For example, in strontium titanate crystals, room-temperature plasticity can be improved by controlling the ratio of the constituent elements. In addition, zinc sulfide crystals are brittle under light irradiation, but show high plasticity in the dark. These unusual plasticity of semiconductor crystals, which had not even been imagined before, has attracted a great deal of attention. These “brittle” materials were not suitable as structural materials before, and consequently have been used exclusively as functional materials. However, the understanding of the mechanisms that can overcome the brittleness of these materials is very useful for various material systems, and the wider application of materials are expected. Here we discuss the recent studies on the improvement of the plasticity of strontium titanate and zinc sulfide based on the in-situ observation of the samples and TEM observations of the dislocation substructures.</p>

Journal

  • KENBIKYO

    KENBIKYO 56 (3), 110-115, 2021-12-30

    The Japanese Society of Microscopy

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