2009 Fiscal Year Final Research Report
Atomic-scale study of lattice defect formation due to electronic excitation in spinel-type oxide
| Project/Area Number |
18206068
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Physical properties of metals
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| Research Institution | Kyushu University |
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Principal Investigator |
MATSUMURA Syo Kyushu University, 工学研究院, 教授 (60150520)
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| Co-Investigator(Renkei-kenkyūsha) |
YASUDA Kazuhiro 九州大学, 大学院・工学研究院, 准教授 (80253491)
SHIIYAMA Kenichi 九州大学, 大学院・工学研究院, 助教 (30243900)
HATA Satoshi 九州大学, 大学院・総合理工学研究院, 准教授 (60264107)
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| Project Period (FY) |
2006 – 2009
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| Keywords | イオン照射 / イオントラック / 高分解能電子顕微鏡 / 電子チャンネリングX線分光 / 分子動力学計算 / 規則-不規則相転移 / 格子欠陥形成エネルギー / 格子欠陥移動エネルギー |
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| Research Abstract |
Structural disordering in magnesium aluminate spinel compounds MgAl_2O_4 induced by strong electronic excitation due to irradiation with swift heavy ions were investigated by means of advanced transmission electron microscopy and molecular dynamics simulations, in connection to their application as inert matrix material in nuclear engineering. The results have clearly revealed the atomistic structure inside ion-tracks as well as the induced disordering behavior quantitatively. The atomistic mechanism for transformation into defective rock-salt structure has been also demonstrated.
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