Study on creep properties of nano-materials by using specimens with controlled shape, or stress concentration, and in situ observation
| Project/Area Number |
26289007
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Osaka University |
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Principal Investigator |
Hirakata Hiroyuki 大阪大学, 工学(系)研究科(研究院), 准教授 (40362454)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2014: ¥12,220,000 (Direct Cost: ¥9,400,000、Indirect Cost: ¥2,820,000)
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| Keywords | マイクロ・ナノ材料力学 / ナノ構造 / クリープ / 材料強度 / ナノマイクロ材料力学 / 材料強度学 |
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| Outline of Final Research Achievements |
Creep experiments were conducted for doglegged nanocolumns with controlled stress concentrated sites, which included the corner of the doglegged shape and the column/substrate interface. Ti and Ta2O5 nanocolumns deformed in a time-dependent manner under room temperature and then fractured at the stress concentrated sites. Stress analyses considering the creep of the nanocolumns suggested that the nanoscale stress concentration dominated the creep fracture life. In addition, the creep rate in air environment was much higher than that in vacuum environment. The results indicated that the creep deformation in the nanocolumns was significantly accelerated by air or moisture environment.
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Report
(4 results)
Research Products
(19 results)
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[Presentation] 自立金ナノ薄膜のクリープき裂伝ぱ特性2015
Author(s)
亀山拓史, 小峠諒太, 近藤俊之, 平方寛之, 崎原雅之, 箕島弘二
Organizer
日本機械学会関西支部第90期定時総会講演会
Place of Presentation
京都大学
Year and Date
2015-03-16 – 2015-03-17
Related Report
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