Time-dependent deformation and fracture at interfaces of nanostructures

• Project/Area Number: 23686025
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Materials/Mechanics of materials
• Research Institution: Osaka University
• Principal Investigator: HIRAKATA Hiroyuki 大阪大学, 工学(系)研究科(研究院), 准教授 (40362454)
• Project Period (FY): 2011-04-01 – 2014-03-31
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥27,170,000 (Direct Cost: ¥20,900,000、Indirect Cost: ¥6,270,000); Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000); Fiscal Year 2012: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000); Fiscal Year 2011: ¥16,250,000 (Direct Cost: ¥12,500,000、Indirect Cost: ¥3,750,000)
• Keywords: マイクロ材料力学 / ナノ構造 / クリープ / 界面 / 破壊 / 材料強度

Research Abstract

The dominant mechanics of creep fracture at interfaces on the nanoscale was evaluated on the basis of creep experiments conducted at room temperature on Ti oblique nanocolumns grown on a Si substrate using glancing angle deposition. The specimens deformed in a time-dependent manner under a constant applied force, and then the Ti nanocolumns fractured at the interface. The local stress distribution along the Ti/Si interface during the creep experiments was analyzed while giving due consideration to the creep of the Ti nanocolumn. The stresses near the interface edge in the region of about 5 nm were very close in the two types of specimens with similar fracture lives although they had different singularities at the edge. This suggested that the creep interfacial fracture was dominated by the local stress field in the nanoscale region.

Research Products

• [Journal Article] Creep Fracture at Interfaces of Titanium Nanocolumns on Silicon Substrate (2014)
  • Author(s): Hiroyuki Hirakata, Yoshiaki Tsutsumi, Kohji Minoshima
  • Journal Title: Engineering Fracture Mechanics Volume: Vol. 117 Pages: 71-83
  • DOI: 10.1016/j.engfracmech.2014.01.008
  • Peer Reviewed
• [Journal Article] The effect of thickness on steady state creep properties of freestanding aluminum nano-films (2012)
  • Author(s): Hiroyuki Hirakata, Naomichi Fukuhara, Shoichi Ajioka, Akio Yonezu, Masayuki Sakihara, Kohji Minoshima
  • Journal Title: Acta Materialia Volume: Vol.60 Issue: 11 Pages: 4438-4447
  • DOI: 10.1016/j.actamat.2012.04.036
  • Peer Reviewed
• [Journal Article] Interface Strength of Structured Nanocolumns Grown by Glancing Angle Deposition (2011)
  • Author(s): Hiroyuki Hirakata, Taku Nishihira, Akio Yonezu, Kohji Minoshima
  • Journal Title: Engineering Fracture Mechanics Volume: Vol. 78 Issue: 16 Pages: 2800-2808
  • DOI: 10.1016/j.engfracmech.2011.08.005
  • Peer Reviewed
• [Presentation] 基板上に成長させたナノコラムのクリープ特性 (2014)
  • Author(s): 田上孟史, 平方寛之, 箕島弘二
  • Organizer: 日本機械学会関西支部第89期定時総会講演会
  • Place of Presentation: 大阪府立大学
• [Presentation] 自立アルミニウムナノ薄膜のクリープき裂伝ぱ特性 (2014)
  • Author(s): 鹿嶋友樹, 平方寛之, 﨑原雅之, 箕島弘二
  • Organizer: 日本機械学会関西支部第89期定時総会講演会
  • Place of Presentation: 大阪府立大学
• [Presentation] 基板上に成長させたナノコラムのクリープ特性 (2014)
  • Author(s): 田上孟史, 平方寛之, 箕島弘二
  • Organizer: 日本機械学会関西支部第８９期定時総会講演会
  • Place of Presentation: 大阪府立大学
• [Presentation] 自立アルミニウムナノ薄膜のクリープき裂伝ぱ特性 (2014)
  • Author(s): 鹿嶋友樹, 平方寛之, 﨑原雅之, 箕島弘二
  • Organizer: 日本機械学会関西支部第８９期定時総会講演会
  • Place of Presentation: 大阪府立大学
• [Presentation] チタンナノコラムのクリープ界面破壊特性 (2013)
  • Author(s): 堤芳明, 平方寛之, 箕島弘二
  • Organizer: 日本機械学会関西支部第88期定時総会講演会
  • Place of Presentation: 大阪工業大学
  • Year and Date: 2013-03-16
• [Presentation] 基板上に成長させたナノコラムのクリープ強度 (2013)
  • Author(s): 田上孟史, 平方寛之, 箕島弘二
  • Organizer: 日本材料学会第8回若手シンポジウム
  • Place of Presentation: 大阪府東大阪市
• [Presentation] 基板上に成長させたナノコラムのクリープ界面強度 (2013)
  • Author(s): 田上孟史, 平方寛之, 箕島弘二
  • Organizer: 第57回日本学術会議材料工学連合講演会
  • Place of Presentation: 京都テルサ
• [Presentation] 基板上に成長させたチタンナノコラムのクリープ変形と界面破壊 (2013)
  • Author(s): 平方寛之, 田上孟史, 堤芳明, 箕島弘二
  • Organizer: 日本機械学会M & M2013材料力学カンファレンス
  • Place of Presentation: 岐阜大学
• [Presentation] ナノ形状制御によるチタンナノコラムの強度評価 (2013)
  • Author(s): 竹内恭介, 平方寛之, 箕島弘二
  • Organizer: 日本機械学会M&M2013材料力学カンファレンス
  • Place of Presentation: 岐阜大学
• [Presentation] 基板上に成長させたチタンナノコラムのクリープ変形と界面破壊 (2013)
  • Author(s): 平方寛之, 田上孟史, 堤芳明, 箕島弘二
  • Organizer: 日本機械学会M&M2013材料力学カンファレンス
  • Place of Presentation: 岐阜大学
• [Presentation] 基板上に成長させたナノコラムのクリープ界面強度 (2013)
  • Author(s): 田上孟史, 平方寛之, 箕島弘二
  • Organizer: 第57回日本学術会議材料工学連合講演会
  • Place of Presentation: 京都テルサ，京都市
• [Presentation] チタンナノコラム構造の時間依存型界面破壊 (2012)
  • Author(s): 堤芳明, 平方寛之, 箕島弘二
  • Organizer: 第56回日本学術会議材料工学連合講演会
  • Place of Presentation: 京都テルサ
  • Year and Date: 2012-10-30
• [Presentation] Size Effects on Creep Property in Aluminum Nano-films (2012)
  • Author(s): Hiroyuki Hirakata, Naomichi Fukuhara, Akio Yonezu, Kohji Minoshima
  • Organizer: Asia Pacific Conference on Fracture and Strength - Mechanics and Materials (APCFS-MM 2012)
  • Place of Presentation: Busan, Korea
  • Year and Date: 2012-05-15
• [Presentation] 自立Alナノ薄膜の定常クリープ特性に及ぼすサイズ効果 (2012)
  • Author(s): 福原直道, 平方寛之, 米津明生, 崎原雅之, 箕島弘二
  • Organizer: 日本機械学会関西支部第87期定時総会講演会
  • Place of Presentation: 関西大学
  • Year and Date: 2012-03-17
• [Presentation] 動的斜め蒸着法により作製したTiナノ構造要素の塑性変形特性 (2012)
  • Author(s): 松永健史, 平方寛之, 米津明生, 箕島弘二
  • Organizer: 日本機械学会関西支部第87期定時総会講演会
  • Place of Presentation: 関西大学
  • Year and Date: 2012-03-17
• [Presentation] Interface Fracture of Titanium Oblique Nanocolumns Grown by Glancing Angle Deposition (2011)
  • Author(s): Hiroyuki Hirakata, Taku Nishihira, Akio Yonezu, Kohji Minoshima
  • Organizer: International Conference on Advanced Technology in Experimental Mechanics 2011 (ATEM'11)
  • Place of Presentation: 神戸国際会議場
  • Year and Date: 2011-09-21
• [Presentation] Interface Fracture Mechanics of Nanoscale Components on A Substrate (2011)
  • Author(s): Hiroyuki Hirakata, Taku Nishihira, Akio Yonezu, Kohji Minoshima
  • Organizer: The Nineteenth Annual International Conference on Composites or Nano Engineering (ICCE-19)
  • Place of Presentation: 上海(中国)
  • Year and Date: 2011-07-28
• [Presentation] チタンナノコラム構造の時間依存型界面破壊
  • Author(s): 平方寛之
  • Organizer: 第56回日本学術会議材料工学連合講演会
  • Place of Presentation: 京都テルサ
• [Presentation] チタンナノコラムのクリープ界面破壊特性
  • Author(s): 平方寛之
  • Organizer: 日本機械学会関西支部第88期定時総会講演会
  • Place of Presentation: 大阪工業大学
• [Presentation] Size Effects on Creep Property in Aluminum Nano-films
  • Author(s): Hiroyuki Hirakata
  • Organizer: Asia Pacific Conference on Fracture and Strength - Mechanics and Materials (APCFS-MM 2012)
  • Place of Presentation: Busan, Korea
• [Remarks] ホームページ
  • URL: http://www-micro.mech.eng.osaka-u.ac.jp/home.html
• [Remarks] 大阪大学大学院工学研究科機械工学専攻箕島・平方研究室
  • URL: http://www-micro.mech.eng.osaka-u.ac.jp/home.html
• [Remarks]
  • URL: http://www-micro.mech.eng.osaka-u.ac.jp/home.html