2015 Fiscal Year Final Research Report
Atomic-resolution structure analysis of LPSO structures to explore the structure-property relationships
| Project Area | Materials Science of synchronized LPSO structure -Innovative Development of Next-Generation Lightweight Structural Materials- |
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| Project/Area Number |
23109002
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| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | Kyoto University |
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Principal Investigator |
INUI HARUYUKI 京都大学, 工学(系)研究科(研究院), 教授 (30213135)
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| Co-Investigator(Kenkyū-buntansha) |
NAGAI Yasuyoshi 東北大学, 金属材料研究所, 教授 (10302209)
ABE Eiji 東京大学, 大学院工学系研究科, 准教授 (70354222)
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| Co-Investigator(Renkei-kenkyūsha) |
KISHIDA Kyosuke 京都大学, 大学院工学研究科, 准教授 (20354178)
INOUE Koji 東北大学, 金属材料研究所, 准教授 (50344718)
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| Project Period (FY) |
2011-04-01 – 2016-03-31
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| Keywords | 原子配列解析 / 透過電子顕微鏡法 / 3次元アトムプローブ法 / 陽電子消滅実験 / 規則－不規則構造 / 規則化 / 積層 / シンクロ型LPSO構造 |
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| Outline of Final Research Achievements |
Crystal structures of LPSO phases in the Mg-Al-Gd and Mg-Zn-Y systems have been determined by atomic-level structural analysis. The enrichment of Gd and Al (Zn and Y) atoms in LPSO phases in the Mg-Al-Gd (Mg-Zn-Y) system occurs in the four consecutive close-packed atomic layers by forming atomic clusters with the atomic arrangement of the L12-type. The in-plane arrangement of these L12 clusters is ordered for LPSO phases in the Mg-Al-Gd system, while for LPSO phases in the Mg-Zn-Y system, it changes from disordered to ordered as the Zn, Y concentration increases. These crystal structures based on the stacking of structural blocks containing the four-consecutive atomic layers enriched with Gd and Al (Zn and Y) atoms can be described crystallographically as order-disorder structures. Many polytypes can be formed depending on the number of atomic layers of structural blocks, and simplest stacking structures and their space groups can be assigned for each of them.
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| Free Research Field |
材料物性
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