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

Karati, A and Hariharan, VS and Ghosh, S and Prasad, A and Nagini, M and Guruvidyathri, K and Mallik, RC and Shabadi, R and Bichler, L and Murty, BS and Varadaraju, UV (2020) Thermoelectric properties of half-Heusler high-entropy Ti2NiCoSn1-xSb1+ x (x = 0.5, 1) alloys with VEC>18. In: Scripta Materialia, 186 . pp. 375-380.

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Abstract

A new set of half-Heusler high-entropy alloys Ti2NiCoSn1-xSb1+ x (x = 0.5, 1), with a valence electron count higher than 18, were investigated for thermoelectric applications. Vacuum arc melting was employed for synthesis. Atom probe analysis confirmed single-phase at atomic level. The alloys were subsequently ball milled for 1 h followed by spark plasma sintering for consolidation. In 1 h BM cases, the alloy with x = 0.5 exhibited a low lattice thermal conductivity of 2.48 Wm�1K�1, and a ZT of 0.29 at 873 K. © 2020

Item Type:	Journal Article
Publication:	Scripta Materialia
Publisher:	Acta Materialia Inc
Additional Information:	Copy right for this article belongs to Acta Materialia Inc
Keywords:	Cobalt alloys; Entropy; Spark plasma sintering; Thermoelectricity; Tin alloys; Vacuum applications, Atom probe analysis; Atomic levels; Half-heusler; Lattice thermal conductivity; Thermoelectric application; Thermoelectric properties; Vacuum arc melting; Valence electron, Titanium alloys
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	02 Nov 2020 11:29
Last Modified:	02 Nov 2020 11:29
URI:	http://eprints.iisc.ac.in/id/eprint/65844

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