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Nanoporous magnesium

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Abstract

In this study, we present freestanding nanoporous magnesium as a novel lightweight material with high potential for structural and functional applications. Thus far, the high reactivity of Mg with oxygen and aqueous media prevented the fabrication of nanoporous Mg. First, in order to synthesize nanoporous Mg, we fabricated a bicontinuous nanocomposite consisting of interpenetrating Mg and non-Mg phases by liquid metal dealloying. The non-Mg phases in the nanocomposite protect Mg against corrosion. Second, we etched the non-Mg phases from the nanocomposite, leaving nanoporous Mg, using HF solution. This process is advantageous because the nanoporous Mg was passivated by a MgF2 layer during the etching. Our approach is very flexible, and we demonstrate that versatile microstructures of the nanoporous Mg—e.g., nanoscale bicontinuous network, hierarchical, or plate-like structures—can be designed for the given needs. More importantly, these nanoporous Mg samples can readily be exposed to air without being harmed by corrosion.

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Acknowledgements

I. V. O. thanks Prof. Geslin, Prof. Joo, and Mrs. Sarmanova for valuable discussions. Funding by the Helmholtz Impuls-und Vernetzungsfonds via the Helmholtz-Chinese Academy of Sciences Joint Research Group “Nanoporous transition metals for strength and function–towards a cost-efficient materials base” grant no. HCJRG-315 and by the International Collaboration Center, Institute for Materials Research (ICC-IMR), Tohoku University, Japan are gratefully acknowledged.

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Authors and Affiliations

  1. Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai, 980-8577, Japan

    Ilya Vladimirovich Okulov, Takeshi Wada, Kunio Yubuta & Hidemi Kato

  2. Institute of Materials Research, Materials Mechanics, Helmholtz-Zentrum Geesthacht, 21502, Geesthacht, Germany

    Ilya Vladimirovich Okulov, Jörg Weissmüller & Jürgen Markmann

  3. MagIC—Magnesium Innovation Centre, Helmholtz-Zentrum Geesthacht, 21502, Geesthacht, Germany

    Sviatlana V. Lamaka & Mikhail L. Zheludkevich

  4. Faculty of Engineering, University of Kiel, 24118, Kiel, Germany

    Mikhail L. Zheludkevich

  5. Institute of Materials Physics and Technology, Hamburg University of Technology, 21073, Hamburg, Germany

    Jörg Weissmüller & Jürgen Markmann

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  1. Ilya Vladimirovich Okulov
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  2. Sviatlana V. Lamaka
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Correspondence to Ilya Vladimirovich Okulov.

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Okulov, I.V., Lamaka, S.V., Wada, T. et al. Nanoporous magnesium. Nano Res. 11, 6428–6435 (2018). https://doi.org/10.1007/s12274-018-2167-9

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  • DOI: https://doi.org/10.1007/s12274-018-2167-9

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