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Screening and Fabrication of Half-Heusler Phases for Thermoelectric Applications

Published online by Cambridge University Press:  01 February 2011

Wilfried Wunderlich  and
Yuichiro Motoyama
Wilfried Wunderlich
Affiliation:
[email protected], Tokai University, Fac. Eng.,, Mat. Sci.Dept.,, Hiratsuka-shi, Kanagawa-ken, Japan
Yuichiro Motoyama
Affiliation:
[email protected], Tokai University, Fac. Eng.,, Mat. Sci.Dept.,, Hiratsuka-shi, Kanagawa-ken, Japan
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Abstract

Half-Heusler phases have gained recently much interest as thermoelectric materials. Screening of possible systems was performed by drawing their stability region in a three-dimensional Pettifor map. The fabrication of Half-Heusler phases requires three steps, surface activation of the raw material by ball milling, arc-melting of pressed pellets and finally long-term annealing treatment in a vacuum furnace. On doped TiCoSb specimens, Seebeck coefficients of 0.1 mV/K, on NiNbSn 0.16 mV/K were measured, although the microstructure was not yet optimized.

Keywords

thermoelectricpowder metallurgycrystallographic structure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1128: Symposium U – Advanced Intermetallic-Based Alloys for Extreme Environment and Energy Applications , 2008 , 1128-U01-10
Copyright
Copyright © Materials Research Society 2009

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References

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