強い重力場下におけるIn-Pb合金中の構成原子の沈降 : 実験およびシミュレーション Sedimentation of Constitutional Atoms in In-Pb Alloy under Strong Gravitational Field (Experiments and Simulations)

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著者

    • 小野 正雄 ONO Masao
    • 日本原子力研究開発機構先端基礎研究センター Advanced Science Research Center, Japan Atomic Energy Agency (JAEA)
    • 黄 新〓 [他] HUANG Xinsheng
    • 産業技術総合研究所サステナブルマテリアル研究部門 Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology (AIST)
    • 井口 裕介 IGUCHI Yusuke
    • 熊本大学衝撃・極限環境研究センター Shock Wave and Condensed Matter Research Center, Kumamoto University
    • 岡安 悟 OKAYASU Satoru
    • 日本原子力研究開発機構先端基礎研究センター Advanced Science Research Center, Japan Atomic Energy Agency (JAEA)
    • 真下 茂 MASHIMO Tsutomu
    • 日本原子力研究開発機構先端基礎研究センター Advanced Science Research Center, Japan Atomic Energy Agency (JAEA)

抄録

  Ultracentrifuge experiments were performed on a miscible In-Pb alloy to study sedimentation of constitutional atoms under a strong gravitational field (maximum acceleration: 10<sup>6</sup> <i>g</i> level, temperature: below melting point (solid), starting state: intermediate α-phase (f.c.t., <i>c</i><sub>0</sub>/<i>a</i><sub>0</sub><1), time duration: 30-150 h). The Graded structures were formed in all centrifuged samples, in which, the Pb content continuously increased, and the In content decreased in the direction of gravitational field. For the centrifuged sample of 100 h in time duration, Pb-rich phase (f.c.c.) and In-rich phase (f.c.t., <i>c</i><sub>0</sub>/<i>a</i><sub>0</sub>>1) appeared at the highest- and lowest-gravitational field sides of the sample, respectively. These observation results showed that the graded structure was continuous in atomic scale, and was formed by sedimentation of constitutional atoms (substitutional atoms). It was also found that the composition change reached steady state within 60 hours. Based on a simulation of sedimentation process, the diffusion coefficient for sedimentation was estimated to be about 8 times larger than that for usual diffusion.<br>

収録刊行物

  • 日本金屬學會誌 = Journal of the Japan Institute of Metals  

    日本金屬學會誌 = Journal of the Japan Institute of Metals 70(6), 511-516, 2006-06-20 

    The Japan Institute of Metals

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各種コード

  • NII論文ID(NAID)
    10018161332
  • NII書誌ID(NCID)
    AN00062446
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    00214876
  • NDL 記事登録ID
    8011322
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-314
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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