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Nanostructuring of Thermoelectric Mg2Si via a Nonequilibrium Intermediate State

Authors

  • Teruyuki Ikeda,

    Corresponding author
    1. Materials Science, California Institute of Technology, 1200 California Blvd., Pasadena, CA 91125, USA
    2. PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
    • Materials Science, California Institute of Technology, 1200 California Blvd., Pasadena, CA 91125, USA.
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  • Laura Haviez,

    1. Materials Science, California Institute of Technology, 1200 California Blvd., Pasadena, CA 91125, USA
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  • Youli Li,

    1. Materials Research Laboratory, University of California, Santa Barbara, CA 93106-5121, USA
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  • G. Jeffrey Snyder

    Corresponding author
    1. Materials Science, California Institute of Technology, 1200 California Blvd., Pasadena, CA 91125, USA
    • Materials Science, California Institute of Technology, 1200 California Blvd., Pasadena, CA 91125, USA.
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Abstract

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A new route to self-assembled nanocomposite thermoelectric materials is proposed. High-energy mechanical alloying brings materials into a nonequilibrium intermediate state, such as a solid solution with an extended solubility. The large driving force for the transformation to the equilibrium state leads to nanometer-scale microstructure formation, which is ideal for reducing lattice thermal conductivity.

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