High-temperature thermoelectric properties of Ti0.5(ZrHf) 0.5-xNbxNi0.9Pd0.1Sn 0.98Sb0.02 half-Heusler alloys

Ping Jen Lee, Long Sun Chao

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

The effects of Nb substitution at the IV metal site on the thermoelectric properties of Ti0.5(ZrHf)0.5-xNbxNi 0.9Pd0.1Sn0.98Sb0.02 half-Heusler alloy compounds were investigated by measuring the electrical resistivity, Hall effect, Seebeck coefficient and thermal conductivity. Changes in its microstructure were characterized using SEM and X-ray diffraction. It was shown that the substitution of Nb for TiNiSn-based alloys led to a significant reduction in the thermal conductivity due to the increase in defects and an enhancement of the electrical conductivity. The best sample reached a ZT of 0.66 at 900 K with an Nb content of x = 0.01.

Original languageEnglish
Pages (from-to)192-196
Number of pages5
JournalJournal of Alloys and Compounds
Volume504
Issue number1
DOIs
Publication statusPublished - 2010 Aug 31

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Fingerprint Dive into the research topics of 'High-temperature thermoelectric properties of Ti<sub>0.5</sub>(ZrHf) <sub>0.5-x</sub>Nb<sub>x</sub>Ni<sub>0.9</sub>Pd<sub>0.1</sub>Sn <sub>0.98</sub>Sb<sub>0.02</sub> half-Heusler alloys'. Together they form a unique fingerprint.

Cite this