Synthesis, crystal structure, and thermoelectric properties of the YbAl 3-ScAl 3 solid solution

Gloria J. Lehr, Donald T. Morelli

    Research output: Contribution to journalArticle

    • 11 Citations

    Abstract

    The Yb 1-xSc xAl 3 alloy solid solution has been successfully synthesized for 0 ≤ x ≤ 1 by a combination of arc melting, pulverization, and consolidation by pulsed electric current sintering. The thermoelectric properties of the alloys have been investigated over the temperature range 80-300 K. Our results on pure YbAl 3 confirm previous studies demonstrating the combination of low electrical resistivity (∼100 μω cm) and large Seebeck coefficient (∼85 μV K -1) at 300 K. With increasing values of x the alloys become even more metallic, but the Seebeck coefficient decreases more gradually than the resistivity, resulting in enhanced thermoelectric power factor for 0 ≤ x ≤ 1. An increase in electronic thermal conductivity is partially offset by a strong suppression in lattice thermal conductivity that arises due to alloy scattering. As a result, the thermoelectric figure of merit of alloys with x = 0.25 is increased by 30% relative to YbAl 3 at 250 K.

    Original languageEnglish (US)
    Pages (from-to)225-229
    Number of pages5
    JournalIntermetallics
    Volume32
    DOIs
    StatePublished - Jan 2013

    Profile

    Joint Loose Bodies
    Seebeck coefficient
    Solid solutions
    Thermal conductivity
    Acetanilides
    Phrenology
    Paroxysmal Dyspnea
    Accidental Falls
    Dihydroalprenolol
    Cytochrome c Group
    Pelvic Inflammatory Disease
    Cerebellar Ataxia
    Cushing Syndrome
    Spark plasma sintering
    Thermoelectric power
    Consolidation
    Melting
    Crystal structure
    Scattering
    Temperature

    Keywords

    • A. Trialuminides
    • B. Thermoelectric properties

    ASJC Scopus subject areas

    • Mechanical Engineering
    • Mechanics of Materials
    • Materials Chemistry
    • Metals and Alloys
    • Chemistry(all)

    Cite this

    Synthesis, crystal structure, and thermoelectric properties of the YbAl 3-ScAl 3 solid solution. / Lehr, Gloria J.; Morelli, Donald T.

    In: Intermetallics, Vol. 32, 01.2013, p. 225-229.

    Research output: Contribution to journalArticle

    Lehr, Gloria J.; Morelli, Donald T. / Synthesis, crystal structure, and thermoelectric properties of the YbAl 3-ScAl 3 solid solution.

    In: Intermetallics, Vol. 32, 01.2013, p. 225-229.

    Research output: Contribution to journalArticle

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