Dependence of thermoelectric behaviour on severe plastic deformation parameters: A case study on p-type skutterudite DD0.60Fe3CoSb12

Rogl, Gerda; Grytsiv, A.; Rogl, P.; Royanian, E.; Bauer, E.; Horky, Jelena; Setman, Daria; Schafler, Erhard; Zehetbauer, M.

doi:10.1016/j.actamat.2013.07.052

Cited by 59 publications

(59 citation statements)

References 33 publications

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“…[38][39][40] The values of ZT < 0.1 presented in this work are similar to the results for pure CoSb 3 materials reported in literature. 12,41,42 Therefore, it can be concluded that the applied manufacturing process allowed production of high-quality, pure, undoped base material for use in further studies.…”

Section: Resultssupporting

confidence: 79%

Microstructure and Thermoelectric Properties of Bulk Cobalt Antimonide (CoSb3) Skutterudites Obtained by Pulse Plasma Sintering

Kruszewski

Zybała

Ciupiński

et al. 2015

Journal of Elec Materi

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The use of the pulse plasma sintering technique for CoSb 3 thermoelectric material consolidation is reported in this work. The influence of sintering temperature on the microstructure and material properties such as the Seebeck coefficient, electrical resistivity, and thermal conductivity has been investigated. It is shown that, for samples fabricated at 923 K and 973 K, there were no significant differences in the average grain size or final phase composition. In both cases, a fine-grained polycrystalline structure of the compacts with density nearly equal to the theoretical value was achieved. Both samples were composed almost uniquely of CoSb 3 phase. The measured thermoelectric parameters such as the Seebeck coefficient, electrical, and thermal conductivity showed similar dependence on temperature. For both samples, the Seebeck coefficient was negative at room temperature and showed a transition from n-to p-type conduction over the temperature range of 400 K to 460 K. The measured minimum thermal conductivity values, 4 W m À1 K À1 to 5 W m À1 K À1 at 723 K, are typical for undoped bulk CoSb 3 . A maximum ZT value of 0.08 at 623 K was obtained for the sample consolidated at 923 K for 5 min. The results of this work are very promising from the point of view of use of pulse plasma sintering as an alternative method for fabrication of a broad range of thermoelectric materials in the future.

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Section: Resultssupporting

confidence: 79%

Microstructure and Thermoelectric Properties of Bulk Cobalt Antimonide (CoSb3) Skutterudites Obtained by Pulse Plasma Sintering

Kruszewski

Zybała

Ciupiński

et al. 2015

Journal of Elec Materi

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“…κ is below 1.83 W/m K for CoSb 2.7 Se 0.3 over the measured temperature range. This is the lowest M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 6 value for unfilled skutterudites to the best of our knowledge and is comparable to those filled skutterudites [8,53]. κ l for all samples initially decreases with temperature, reaches the minimum, and then increases with higher temperature.…”

Section: Thermoelectric Properties Of Cosb 3-x Se Xsupporting

confidence: 51%

Structure and thermoelectric properties of Se- and Se/Te-doped CoSb3 skutterudites synthesized by high-pressure technique

Dong

Yang

et al. 2015

Journal of Alloys and Compounds

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“…This problem was addressed by suitably increasing the HPT processing temperature in order to avoid the formation of cracks and voids, thus keeping the increase in resistivity sufficiently low to achieve an overall increase in ZT ( Figure 22). [145,150] By optimizing the HPT-processing temperature, pressure, and strain, ZT was further increased by a factor of 2-3 ( [145,150]; Figure 22) compared with the value before HPT. Finally, with ZT = 1.9, a world record for n-type skutterudites was set using this strategy Figure 22.…”

Section: Thermoelectricsmentioning

confidence: 99%

Fundamentals of Superior Properties in Bulk NanoSPD Materials

Valiev

Estrin

Horita

et al. 2015

Materials Research Letters

283

136

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Bulk nanoSPD materials are materials with nanostructural features, such as nanograins, nanoclusters, or nanotwins, produced by severe plastic deformation (SPD) techniques. Such nanostructured materials are fully dense and contamination free and in many cases they have superior mechanical and functional properties. Here, we provide a critical overview of such materials, with a focus on the fundamentals for the observed extraordinary properties. We discuss the unique nanostructures that lead to the superior properties, the underlying deformation mechanisms, the critical issues that remain to be investigated, future research directions, and the application potential of such materials.

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Dependence of thermoelectric behaviour on severe plastic deformation parameters: A case study on p-type skutterudite DD0.60Fe3CoSb12

Cited by 59 publications

References 33 publications

Microstructure and Thermoelectric Properties of Bulk Cobalt Antimonide (CoSb3) Skutterudites Obtained by Pulse Plasma Sintering

Microstructure and Thermoelectric Properties of Bulk Cobalt Antimonide (CoSb3) Skutterudites Obtained by Pulse Plasma Sintering

Structure and thermoelectric properties of Se- and Se/Te-doped CoSb3 skutterudites synthesized by high-pressure technique

Fundamentals of Superior Properties in Bulk NanoSPD Materials

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