Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1448563 | Acta Materialia | 2010 | 8 Pages |
Abstract
The n-type thermoelectric properties of the half-Heusler compound ZrNiSn can be converted to p-type by the addition of Co and Ir. We found that Co and Ir atoms preferably occupy the vacancy sites instead of substituting at Ni sites. This implies that the phase stability of the compound gradually changes towards that of the Heusler compound Zr(Ni,M)2Sn, where M is Co and/or Ir. The occupation of vacancy sites by Co and Ir atoms leads to a drastic reduction in lattice thermal conductivity owing to the enhancement of phonon scattering by the solid solution effect.
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Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Yoshisato Kimura, Toshiyasu Tanoguchi, Takuji Kita,