Thermoelectric properties of nanocrystalline half-Heusler high-entropy Ti2NiCoSn1−xSb1+x (x = 0.3, 0.5, 0.7, 1) alloys with VEC > 18

Karati, A and Ghosh, S and Nagini, M and Mallik, RC and Shabadi, R and Murty, BS and Varadaraju, UV (2022) Thermoelectric properties of nanocrystalline half-Heusler high-entropy Ti2NiCoSn1−xSb1+x (x = 0.3, 0.5, 0.7, 1) alloys with VEC > 18. In: Journal of Alloys and Compounds, 927 . pp. 1-9.

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Abstract

Powder metallurgy route has been employed to synthesize nanocrystalline Ti2NiCoSn1−xSb1+x (x = 0.3, 0.5, 0.7, 1) alloys for thermoelectric applications. Atom probe analysis confirmed the homogeneous distribution of elements in the half-Heusler phase at a scale of few nanometers. A combination of nanostructuring, lattice distortion and interfacial scattering brings about a reduction in lower thermal conductivity which brings forth an improvement in ZT. Ti2NiCoSb2 exhibited the highest ZT of 0.26 due to the increments effected by higher power factor and lower thermal conductivity.

Item Type:	Journal Article
Publication:	Journal of Alloys and Compounds
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to Elsevier Ltd.
Keywords:	Atom probe tomography; Half-Heusler; High entropy alloy; Nanocrystalline; Thermoelectric
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	07 Oct 2022 04:49
Last Modified:	07 Oct 2022 04:49
URI:	https://eprints.iisc.ac.in/id/eprint/77007

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