High-pressure torsion, a new processing route for thermoelectrics of high ZTs by means of severe plastic deformation

Rogl, Gerda; Setman, Daria; Schafler, Erhard; Horky, Jelena; Kerber, Michael; Zehetbauer, M.; Falmbigl, Matthias; Rogl, P.; Royanian, E.; Bauer, E.

doi:10.1016/j.actamat.2011.12.023

Cited by 115 publications

(82 citation statements)

References 27 publications

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“…Another representative of this material group is FeSb 3 . Compared to CoSb 3 , a softening of the phonon modes was observed, which indicated a lower speed of sound in FeSb 3 and thus a lower lattice thermal conductivity 4 . However, the FeSb 3 phase is not an equilibrium phase.…”

Section: Introductionmentioning

confidence: 97%

Structural and thermoelectric properties ofFeSb3skutterudite thin films

et al. 2015

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Skutterudites are promising materials for future thermoelectric applications. Whereas the skutterudite CoSb 3 is intensively studied, nearly no investigations for FeSb 3 are performed due to its metastable character and the comparably low decomposition temperature.In this work, single phase FeSb 3 thin films were prepared by co-deposition of Fe and Sb using molecular beam epitaxy at room temperature followed by post-annealing. The transport properties of a Fe-Sb composition series were determined and reveal high power factors S 2 σ up to 14 µW/K 2 cm. Furthermore, the structural parameters, the electronic structure and the transport parameters were calculated by density functional theory giving excellent agreement to the experimental data.

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Section: Introductionmentioning

confidence: 97%

Structural and thermoelectric properties ofFeSb3skutterudite thin films

et al. 2015

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“…These ZT values were further increased to 1.4 and 1.9, respectively, by nanostructuring via high-energy ball milling and/or severe plastic deformation introduced by high-pressure torsion [8,9,[63][64][65][66].…”

Section: Introductionmentioning

confidence: 99%

Nanostructuring of p- and n-type skutterudites reaching figures of merit of approximately 1.3 and 1.6, respectively

et al. 2014

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“…Effect of nanostructure formation by SPD on various properties has been reported for a wide variety of materials ranging from conventional structural materials to functional alloys and intermetallic compounds, such as shape memory alloys, 1) thermoelectric materials 2) and magnetic materials. 3) Among them, TiNi-based shape memory alloys have been investigated most intensively.…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Study on Amorphization of TiNi by Severe Plastic Deformation

2013

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Amorphous/nanocrystalline formation process of TiNi alloys induced by severe plastic deformation was studied by using molecular dynamics simulations. During the simulations of the extrusion process of TiNi specimens, we have observed nanocrystalline formation as well as amorphous formation. The relation between the area reduction by extrusion and the volume fraction of the amorphous phases has been calculated and agrees with the experimental observations. We have also observed the formation of arrays of edge dislocations or partial wedge disclinations prior to nanocrystalline formation.

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High-pressure torsion, a new processing route for thermoelectrics of high ZTs by means of severe plastic deformation

Cited by 115 publications

References 27 publications

Structural and thermoelectric properties ofFeSb3skutterudite thin films

Structural and thermoelectric properties ofFeSb3skutterudite thin films

Nanostructuring of p- and n-type skutterudites reaching figures of merit of approximately 1.3 and 1.6, respectively

Molecular Dynamics Study on Amorphization of TiNi by Severe Plastic Deformation

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