| 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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| 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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