2013 Fiscal Year Final Research Report
Preparation and application of nanoporous metals by using dealloying in a metallic melt
| Project/Area Number |
23656422
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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 |
Structural/Functional materials
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| Research Institution | Tohoku University |
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Principal Investigator |
KATO HIDEMI 東北大学, 金属材料研究所, 准教授 (80323096)
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| Co-Investigator(Kenkyū-buntansha) |
YUBUTA Kunio 東北大学, 金属材料研究所, 准教授 (00302208)
WADA Takeshi 東北大学, 金属材料研究所, 助教 (10431602)
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| Project Period (FY) |
2011 – 2013
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| Keywords | ポーラス金属 / デアロイング |
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| Research Abstract |
Novel method for preparation of open-cell nanoporous base metals by using dealloying reaction in a metallic melt was successfully developed. By immersing an alloy precursor into a metallic melt, specific component was dissolved selectively into a metallic melt and the remaining component self-organized into a nanoporous structure. The analyses on microstructure and compositional changes revealed that the diffusion of solute atom in the metallic melt is a rate limiting step and that the ligament size coarsened for surface relaxation via surface diffusion mechanism. These results indicated that the formation mechanism of nanoporous structure by dealloying in metallic melt is essentially the same with that in aqueous solution.
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