| Project/Area Number |
16K13640
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Nanomaterials engineering
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| Research Institution | Osaka University |
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Principal Investigator |
Sato Kazuhisa 大阪大学, 超高圧電子顕微鏡センター, 准教授 (70314424)
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| Co-Investigator(Renkei-kenkyūsha) |
YASUDA HIDEHIRO 大阪大学, 超高圧電子顕微鏡センター, センター長・教授 (60210259)
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 低次元性 / 極限環境 / ナノ磁石 / 電子照射 / 規則合金 / FeNi / 照射促進規則化 / 超高圧電子顕微鏡 |
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| Outline of Final Research Achievements |
L10-type FeNi ordered phase, which was firstly found in a meteorite, is hard to synthesize as a bulk form at a laboratory. We have studied rapid atomic diffusion in FeNi alloy thin films under 1 MeV-electron irradiation in an attempt to largely enhance atomic ordering at low annealing temperatures. In this study, (1) electron irradiation-enhanced ordering of Co-Pt alloy nanoparticles was confirmed, (2) L10-FeNi phase was formed via electron irradiation-enhanced ordering, and (3) effect of 2-MeV-electron irradiation on structural changes of ordered FeNi nanocrystalline alloys was examined. We have demonstrated that radiation-enhanced ordering is a suitable way to promote atomic ordering in FeNi alloy. We proved that L10-FeNi ordered phase is the stable phase at 573 K.
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