| Project/Area Number |
26820325
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Material processing/Microstructural control engineering
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| Research Institution | Hokkaido University |
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Principal Investigator |
OONO Naoko 北海道大学, 工学研究院, 助教 (40512489)
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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 |
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
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| Keywords | 酸化物粒子 / 分散強化 / 析出 / 自由エネルギー / ODS鋼 / 析出の活性化エネルギー / Y-(Al, Ti, Zr)複合酸化物 / ナノ酸化物粒子 / Al, Ti, Zr添加 / 微細組織 |
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| Outline of Final Research Achievements |
The process of precipitating oxide particles in oxide dispersion strengthened (ODS) steels during the temperature rising stage of sintering is studied, by analyzing the microstructure of the systematically heat treated mechanically alloyed (MA) powders, and classified by free energy of precipitation. Comparing the Ti, Al and Zr added / solute elements-free ODS steel, the calculation result of the precipitation critical radius and the activation energy of the precipitation at 700° C, which is the precipitation starting temperature of Y2O3, is small in the order of Y2Zr2O7 < Y2O3 < Y2Ti2O7 < YAlO3. This order agreed with the experimental result of this research.
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