The thermoelectric properties and high-temperature stability of the Ti1−xVxCoSb1−xSnx solid solution have been investigated.</p

Asaad, Maryana

Bos, Jan-Willem G

Buckman, Jim

Smith, R. I.

RSC Advances

English

Half-Heuslers (HHs) are attracting widespread interest for thermoelectric waste heat recovery. This manuscript extends the known TiCoSb based HH compositions and provides new insight into their high-temperature stability. X-ray powder diffraction revealed an upper solubility limit near x = 0.4 for the Ti1-xVxCoSb1-xSnx series. Rietveld analysis of neutron powder diffraction data indicated that TiCoSb is stoichiometric, and confirmed that V and Sn are successfully co-substituted. Scanning electron microscopy revealed small grain sizes (2 and crystalline CoSb, suggesting that the degradation is driven by exposure to trace amounts of oxygen. The unintentional incorporation of Ta leads to n-type doping and maximum power factors S2/ρ = 0.55 mW m-1 K-2 at 550 K and S2/ρ = 0.8 mW m-1 K-2 at 900 K were observed for TiCoSb and the x = 0.3 sample, respectively.</p

Heriot Watt Pure

Thermoelectric properties and high-temperature stability of the Ti1-xVxCoSb1-xSnx half-Heusler alloys

M. Asaad

J. Buckman

R. I. Smith

J. W. G. Bos

Crossref

Thermoelectric properties and high-temperature stability of the Ti1−xVxCoSb1−xSnx half-Heusler alloys

Asaad, M

Buckman, J

Smith, RI

Bos, JWG

University of St. Andrews - Pure

Thermoelectric properties and high-temperature stability of the Ti1-xVxCoSb1-xSnx half-Heusler alloys

https://pureapps2.hw.ac.uk/ws/files/10743751/TiCoSb_VCoSn_RSCAdvances_Pure.pdf

Thermoelectric properties and high-temperature stability of the Ti<sub>1-x</sub>V<sub>x</sub>CoSb<sub>1-x</sub>Sn<sub>x</sub> half-Heusler alloys

Abstract

Similar works

Full text

Available Versions

Heriot Watt Pure

Crossref

Heriot Watt Pure

University of St. Andrews - Pure

University of St. Andrews - Pure