| Project/Area Number |
22K14508
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 26050:Material processing and microstructure control-related
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| Research Institution | Kyoto University |
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Principal Investigator |
ZHANG Zelei 京都大学, 工学研究科, 特定助教 (90913400)
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| Project Period (FY) |
2022-04-01 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2022: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | Electrodeposition / Al alloys / Hardness / Corrosion resistance / Elecctrodeposition / Ionic liquids / Aluminum alloy / Mechanical property / Ionic liquid |
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| Outline of Research at the Start |
The strength and corrosion resistance are always mutually exclusive in Al alloys through general work and aging strengthening methods. This research will electrodeposit supersaturated Al(M) (M: alloying elements) solid solutions for maximizing their strength and corrosion resistance simultaneously.
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| Outline of Final Research Achievements |
The heterogeneous microstructure in aluminum (Al) alloys, composed of an α-Al solid solution matrix and coarse intermetallics, presents a challenge in balancing mechanical and anti-corrosion properties. Supersaturated Al-based solid solutions are expected to address this issue. In this study, supersaturated Al(Fe) and Al(Si) solid solutions with a single phase have been electrodeposited in chloroaluminate ionic liquids (ILs). The active species responsible for Fe or Si reduction have been identified through spectral analysis and DFT calculations. Al(Fe) deposits show simultaneous improvements in mechanical and anti-corrosion properties, while Al(Si) exhibits a less compact microstructure, leading to failure. Furthermore, thermal decomposition of Al(Fe) and Al(Si) deposits can be suppressed above 200 ℃.
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| Academic Significance and Societal Importance of the Research Achievements |
Al alloys are subject to the conflict between strength and corrosion resistance. This research gives high-strength but also corrosion-resistant Al-Fe alloys, thanks to a homogeneous microstructure.
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