Bhardwaj, A. and Misra, D. K. and Pulikkotil, J. J. and Auluck, S. and Dhar, A. and Budhani, R. C. (2012) Implications of nanostructuring on the thermoelectric properties in half-Heusler alloys. Applied Physics Letters, 101 (13). pp. 133103-133108. ISSN 0003-6951

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Abstract

High energy ball milled Zr0.25Hf0.75NiSn alloys subjected to spark plasma sintering show an enhanced thermoelectric figure of merit in comparison with its normal bulk material synthesized by arc-melting process. The enhancement is due to increase in Seebeck coefficient with simultaneous decrease in thermal conductivity which follows due to increase in the cell volume. Theoretical calculations find that volume expansion facilitates band narrowing effects leading to high Seebeck coefficient and that decreasing orbital overlap which results in weak bonding leads to dampening the phonon propagation in addition to the interface scattering of phonons from phase boundaries.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s American Institute of Physics.
Subjects:	Applied Physics/Condensed Matter
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	12 Mar 2020 11:36
Last Modified:	12 Mar 2020 11:36
URI:	http://npl.csircentral.net/id/eprint/3535

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