| Project/Area Number |
26630290
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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 |
Physical properties of metals/Metal-base materials
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| Research Institution | The University of Tokyo |
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Principal Investigator |
Abe Eiji 東京大学, 工学(系)研究科(研究院), 准教授 (70354222)
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| Research Collaborator |
KATO Takeshi
SEKI Takehito
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | 準結晶 / 電子顕微鏡 / 結晶学 / 原子配列 / マグネシウム合金 / 複雑合金相 |
|---|
| Outline of Final Research Achievements |
Quasicrystals are constructed by quasiperiodic arrays of atoms, and their physical origin has been attributed to the unique rotational symmetry (e.g., five-fold rotational symmetry) that is incompatible with conventional periodic order. In the present study, we show that, for the first time, the quasiperiodic atomic structure occurs with a normal cubic symmetry (i.e., quasiperiodic cubic crystal) in a rapidly solidified Mg-60at%Al alloy, based on hyperspace crystallography analysis of the electron diffraction patterns and the direct structure observations by high-resolution electron microscopy. The present observations suggest that the quasiperiodic order is governed not by underlying specific symmetry but perhaps by intrinsic interactions between the atoms/molecules, providing an important hint on the hierarchical principle how the atoms build up periodic/aperiodic materials.
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