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Solid-State Bonding of Bulk PbTe to Nickel Electrode for Thermoelectric Modules

Journal Article


Abstract


  • The efficiency of thermoelectric generators is

    defined by the thermoelectric performance of materials, as

    expressed by the thermoelectric figure-of-merit, and their

    contacts with electrodes. Lead chalcogenide thermoelectric

    materials and, in particular, PbTe perform well in the 500−900

    K temperature range. Here, we have successfully bonded bulk

    PbTe to Ni electrode to generate a diffusion barrier, avoiding

    continuous reaction of the thermoelectric legs and conducting

    electrodes at the operating temperature. We have modified the

    commonly used spark plasma sintering assembly method to

    join the Ni electrode to bulk PbTe by driving the total supplied electrical current through the Ni and PbTe solid interfaces. This

    permits the formation of a thin diffusion layer, roughly 4.5 μm in thickness, which is solely comprised of nickel telluride. This

    new technique toward the bonding of PbTe with the electrode is beneficial for thermoelectric materials, since high temperatures

    have proven to be damaging to the quality of bulk material. The interphase microstructure, chemical composition, and

    crystallographic information were evaluated by a scanning electron microscope equipped with electron backscattered diffraction

    analysis. The obtained phase at the Ni/PbTe contact is found to be β2 Ni3±xTe2 with a basic tetragonal crystallographic structure

    of the defective Cu2Sb type.

UOW Authors


  •   Reales Ferreres, Xavier (external author)
  •   Gazder, Azdiar
  •   Manettas, Andrew (external author)
  •   Aminorroaya-Yamini, Sima (external author)

Publication Date


  • 2018

Citation


  • Reales Ferreres, X., Gazder, A., Manettas, A. & Aminorroaya-Yamini, S. (2018). Solid-State Bonding of Bulk PbTe to Nickel Electrode for Thermoelectric Modules. Acs Applied Energy Materials, 1 (2), 348-354.

Scopus Eid


  • 2-s2.0-85056484281

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3629

Number Of Pages


  • 6

Start Page


  • 348

End Page


  • 354

Volume


  • 1

Issue


  • 2

Place Of Publication


  • United States

Abstract


  • The efficiency of thermoelectric generators is

    defined by the thermoelectric performance of materials, as

    expressed by the thermoelectric figure-of-merit, and their

    contacts with electrodes. Lead chalcogenide thermoelectric

    materials and, in particular, PbTe perform well in the 500−900

    K temperature range. Here, we have successfully bonded bulk

    PbTe to Ni electrode to generate a diffusion barrier, avoiding

    continuous reaction of the thermoelectric legs and conducting

    electrodes at the operating temperature. We have modified the

    commonly used spark plasma sintering assembly method to

    join the Ni electrode to bulk PbTe by driving the total supplied electrical current through the Ni and PbTe solid interfaces. This

    permits the formation of a thin diffusion layer, roughly 4.5 μm in thickness, which is solely comprised of nickel telluride. This

    new technique toward the bonding of PbTe with the electrode is beneficial for thermoelectric materials, since high temperatures

    have proven to be damaging to the quality of bulk material. The interphase microstructure, chemical composition, and

    crystallographic information were evaluated by a scanning electron microscope equipped with electron backscattered diffraction

    analysis. The obtained phase at the Ni/PbTe contact is found to be β2 Ni3±xTe2 with a basic tetragonal crystallographic structure

    of the defective Cu2Sb type.

UOW Authors


  •   Reales Ferreres, Xavier (external author)
  •   Gazder, Azdiar
  •   Manettas, Andrew (external author)
  •   Aminorroaya-Yamini, Sima (external author)

Publication Date


  • 2018

Citation


  • Reales Ferreres, X., Gazder, A., Manettas, A. & Aminorroaya-Yamini, S. (2018). Solid-State Bonding of Bulk PbTe to Nickel Electrode for Thermoelectric Modules. Acs Applied Energy Materials, 1 (2), 348-354.

Scopus Eid


  • 2-s2.0-85056484281

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3629

Number Of Pages


  • 6

Start Page


  • 348

End Page


  • 354

Volume


  • 1

Issue


  • 2

Place Of Publication


  • United States