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

Karati, Anirudha and Ghosh, Sanyukta and Nagini, M. and Mallik, Ramesh Chandra and Shabadi, Rajashekhara and Murty, B S and et al, . (2022) Thermoelectric properties of nanocrystalline half-Heusler high-entropy Ti2NiCoSn1−xSb1+x (x = 0.3, 0.5, 0.7, 1) alloys with VEC > 18. Journal of Alloys and Compounds, 927. pp. 1-9. ISSN 0925-8388

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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. (C) 2022 Elsevier B.V. All rights reserved.

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IITH Creators:

IITH Creators	ORCiD
Murty, B S	https://orcid.org/0000-0002-4399-8531

Item Type:

Article

Additional Information:

The authors gratefully acknowledge National Facility for Atom Probe Tomography (NFAPT) funded by DST (No. SR/NM/NS-1041/2016) for carrying out APT studies.

Uncontrolled Keywords:

Half-Heusler High entropy alloy Thermoelectric Nanocrystalline Atom probe tomography

Subjects:

Others > Metallurgy
Materials Engineering > Materials engineering

Divisions:

Department of Material Science Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

03 Oct 2022 13:43

Last Modified:

03 Oct 2022 13:43