Are there metals in which vacancies repel each other?

• Project/Area Number: 24656371
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Physical properties of metals
• Research Institution: Shimane University
• Principal Investigator: ARAKAWA Kazuto 島根大学, 総合理工学研究科(研究院), 准教授 (30294367)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 空孔 / 格子欠陥 / 電子顕微鏡 / タングステン / 高融点金属

Outline of Final Research Achievements

Supersaturated vacancies, which are produced upon plastic deformation, quench, crystal growth, and energetic particle irradiation, often agglomerate and form clusters such as voids, and significantly degrade mechanical properties of materials. The origin of the vacancy-cluster formation is attractive interaction of vacancies. The idea of the attractive interaction of vacancies has been a common knowledge in materials science. If the interaction of vacancies is repulsive, vacancy-cluster formation is expected to be suppressed. Are there metals with repulsive interaction of vacancies? In the present study, we examined vacancy agglomeration processes in tungsten using high-voltage electron microscopy, and obtained results supporting the idea of repulsive interaction of vacancies.

Research Products

• [Journal Article] High Temperature Annealing of Ion Irradiated Tungsten (2015)
  • Author(s): F. Ferroni, X. Yi, K. Arakawa, S. Fitzgerald, P.D. Edmondson, and S.G. Roberts
  • Journal Title: Acta Materialia Volume: 90 Pages: 380-393
  • DOI: 10.1016/j.actamat.2015.01.067
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] One-Dimensional Glide Motion of “Naked” Nanoscale 1/2<111> Prismatic Dislocation Loops in Iron (2014)
  • Author(s): K. Arakawa, T. Amino, M. Isshiki, K. Mimura, M. Uchikoshi, and H. Mori
  • Journal Title: ISIJ International Volume: 54 Issue: 10 Pages: 2421-2424
  • DOI: 10.2355/isijinternational.54.2421
  • NAID: 130004713339
  • ISSN: 0915-1559, 1347-5460
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Spatial ordering of nano-dislocation loops in ion-irradiated materials (2014)
  • Author(s): S.L. Dudarev, K. Arakawa, X. Yi, Z. Yao, M.L. Jenkins, M.R. Gilbert, P.M. Derlete
  • Journal Title: Journal of Nuclear Materials Volume: 455 Issue: 1-3 Pages: 16-20
  • DOI: 10.1016/j.jnucmat.2014.02.032
  • Peer Reviewed
• [Journal Article] 高純度金属を用いた格子欠陥の挙動に関する研究 (依頼解説) (2014)
  • Author(s): 荒河一渡
  • Journal Title: 金属 Volume: 84 Pages: 18-24
• [Journal Article] Lorentzian-like image blur of gold nanoparticles on thick amorphous silicon films in ultra-high-voltage transmission electron microscopy (2013)
  • Author(s): Y. Oshima, R. Nishi, K. Asayama, K. Arakawa, K. Yoshida, T. Sakata, E. Taguchi and H. Yasuda
  • Journal Title: Microscopy Volume: 62 Issue: 5 Pages: 521-531
  • DOI: 10.1093/jmicro/dft031
  • NAID: 40021302068
  • Peer Reviewed
• [Journal Article] Detection and In Situ Switching of Unreversed Interfacial Antiferromagnetic Spins in a Perpendicular-Exchange-Biased System (2012)
  • Author(s): Y. Shiratsuchi
  • Journal Title: Physical Review Letters Volume: 109 Issue: 7
  • DOI: 10.1103/physrevlett.109.077202
  • Peer Reviewed
• [Journal Article] [3] Femtosecond Laser-Driven Shock Synthesis of High-Pressure Structure of Silicon (2012)
  • Author(s): M. Tsujino, T. Sano, N. Ozaki, O. Sakata, K. Arakawa, M. Okoshi, N. Inoue, H. Mori, R. Kodama, K. Kobayashi, and A. Hirose
  • Journal Title: Journal of Japan Laser Processing Society Volume: 19 Pages: 54-59
  • Peer Reviewed
• [Presentation] 水素関連欠陥ダイナミクスのTEM観測 (2015)
  • Author(s): 荒河一渡
  • Organizer: 日本金属学会2015年春期大会
  • Place of Presentation: 東京大学
  • Year and Date: 2015-03-18 – 2015-03-20
  • Invited
• [Presentation] 銅中の水素関連キャビティの構造 (2014)
  • Author(s): 石田佳大, 保田英洋, 森博太郎, 荒井重勇, 田中信夫, 深井有, 荒河一渡
  • Organizer: 日本金属学会春期講演大会 (第155 回)
  • Place of Presentation: 名古屋大学
  • Year and Date: 2014-09-24 – 2014-09-26
• [Presentation] Studies on Dynamics of Small Defects in Metals using in-situ TEM (2014)
  • Author(s): K. Arakawa
  • Organizer: Seminar
  • Place of Presentation: KTH, Sweden
  • Year and Date: 2014-09-18
  • Invited
• [Presentation] 格子欠陥のその場TEM (2014)
  • Author(s): 荒河一渡
  • Organizer: 日本顕微鏡学会 超高分解能顕微鏡法分科会 第9回研究会 「先端顕微鏡を用いた応用研究」
  • Place of Presentation: 東京八重洲ホール（東京）
  • Invited
• [Presentation] In-situ TEM Study of Dynamics of Dislocation Loops in Fe and Fe-Cr Alloys (2013)
  • Author(s): K. Arakawa
  • Organizer: GETMAT (Generation IV and Transmutation Materials)
  • Place of Presentation: Park Inn Hotel (Berlin)
  • Invited
• [Presentation] 電子顕微鏡その場観察による微小格子欠陥のダイナミクスの抽出 (2013)
  • Author(s): 荒河一渡
  • Organizer: 日本顕微鏡学会 第57回シンポジウム「顕微鏡法の次世代への継承」
  • Place of Presentation: 愛知県産業労働センター（名古屋）
  • Invited
• [Presentation] 透過型電子顕微鏡法による金属中の照射欠陥の挙動に関する研究 (2013)
  • Author(s): 荒河一渡
  • Organizer: 照射研究セミナー
  • Place of Presentation: 電力中央研究所（狛江）
  • Invited
• [Presentation] 超高圧電子顕微鏡の材料応用 (2013)
  • Author(s): 荒河一渡
  • Organizer: 日本顕微鏡学会 様々な極微イメージング技術研究部会 第1回研究会
  • Place of Presentation: 九州大学（福岡）
  • Invited
• [Presentation] 体心立方金属中の自己格子間原子の挙動について (2013)
  • Author(s): 荒河一渡
  • Organizer: 反応科学超高圧電子顕微鏡の応用に関する合同シンポジウム
  • Place of Presentation: 名古屋大学、名古屋
  • Invited
• [Presentation] 自己格子間原子の集合体は原子空孔を常に吸収し得るか？ (2013)
  • Author(s): 荒河一渡、網野岳文、田中信夫、荒井重勇
  • Organizer: 日本金属学会春期大会
  • Place of Presentation: 東京理科大学、東京
• [Presentation] 水素関連欠陥のダイナミクスのTEM観察―水素誘起空孔の生成と拡散促進効果― (2012)
  • Author(s): 荒河一渡
  • Organizer: 水素量子アトミクス研究会
  • Place of Presentation: KEK、つくば
  • Invited
• [Presentation] 金属中の格子欠陥の基礎とTEMによる欠陥ダイナミクスの研究 (2012)
  • Author(s): 荒河一渡
  • Organizer: レーザー学会、レーザー衝撃科学の基礎と応用
  • Place of Presentation: 浜松ホトニクス東京支店、東京
  • Invited
• [Presentation] 超高圧電子顕微鏡による金属における自己格子間原子のダイナミクスの抽出 (2012)
  • Author(s): 荒河一渡
  • Organizer: 大阪大学超高圧電子顕微鏡センター、材料系共同利用研究報告会
  • Place of Presentation: 大阪大学、大阪
  • Invited
• [Presentation] 超高圧電子顕微鏡による金属中の自己格子間原子の移動次元の検出 (2012)
  • Author(s): 荒河一渡、網野岳文、森博太郎
  • Organizer: 日本顕微鏡学会学術講演会
  • Place of Presentation: つくば国際会議場、つくば
• [Presentation] Au における自己格子間原子の構造：ダンベルかクラウディオンか？ (2012)
  • Author(s): 荒河一渡、長澤良太、網野岳文、森博太郎
  • Organizer: 日本金属学会秋期大会
  • Place of Presentation: 愛媛大学、松山
• [Presentation] Recent Studies on Elementary Processes of Radiation Damage using in-situ TEM (2012)
  • Author(s): Kazuto Arakawa, Takafumi Amino, Hirotaro Mori
  • Organizer: MRS Fall Meeting 2012, Materials under Extremes: from Fundamentals to Component Behavior
  • Place of Presentation: Boston, MA, USA
  • Invited
• [Remarks] 荒河一渡 研究室
  • URL: http://tem-defect.jp/
• [Remarks] 荒河一渡 研究室
  • URL: http://tem-defect.jp/