Improvement of thermoelectric properties of icosahedral AlPdRe quasicrystals by Fe substitution for Re

Junpei T. Okada, Takehito Hamamatsu, Shizuka Hosoi, Tomohiro Nagata, Kaoru Kimura, Kazuhiro Kirihara

研究成果: Article査読

23 被引用数 (Scopus)

抄録

The thermoelectric properties of quaternary icosahedral AlPdReFe quasicrystals obtained by replacing Re with Fe in icosahedral AlPdRe quasicrystals have been studied according to the guiding principle of weakly bonded rigid heavy clusters (WBRHCs). Anisotropy in the microstructures of arc-melted and annealed samples was found, and the electrical and thermal conductivities are larger in the direction perpendicular to the bottom of the arc-melted button than in the parallel case. The dimensionless figure of merit (ZT) in the perpendicular direction was increased 2.6 times from 0.08 to 0.21 by Fe substitution for Re in the icosahedral AlPdRe quasicrystals, which was caused by the increase of the Seebeck coefficient and the decrease of the phonon thermal conductivity, and the increase of the electrical conductivity, expected and not for the WBRHCs, respectively.

本文言語English
論文番号103702
ジャーナルJournal of Applied Physics
101
10
DOI
出版ステータスPublished - 2007
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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