Experimenting with hot isostatically pressed (HIP) nano grained bismuth-telluride-based alloys

Jouko Virta, Jyrki Tervo

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    Abstract

    Hot Isostatic Pressing (HIP) is was used for compaction of nano grained bismuth-telluride samples and results were compared to Spark Plasma Sintered (SPS) samples of the same materials. The powders were essentially the same as presented by Vasilevskiy1 et al, 2010. The (BixSb1-x)2(TeySe1-y)3 thermoelectric alloys studied in this article were produced by mechanical alloying under an inert atmosphere. The p-type alloy composition corresponds to x = 0.2, y = 1 and for the n-type material x = 0.95, y = 0.95. For HIP treatment the n- and p-type powders were encapsulated in copper cylinders under protective argon atmosphere. The HIP temperature was kept low to avoid excess grain growth of the materials. The electrical conductivity, carrier mobility, carrier concentration and Seebeck coefficient of HIP and SPS compacted materials were measured and compared.
    Original languageEnglish
    Title of host publication9th European Conference on Thermoelectrics ECT2011
    EditorsK.M. Paraskevopoulos , E. Hatzikraniotis
    PublisherAmerican Institute of Physics (AIP)
    Pages544-547
    ISBN (Print)978-0-7354-1048-0
    DOIs
    Publication statusPublished - 2011
    MoE publication typeA4 Article in a conference publication

    Publication series

    SeriesAIP Conference Proceedings
    Number1
    Volume1449

    Keywords

    • hot isostatic pressing
    • Bismuth-Tellunde properties

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