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

doi:10.1063/1.2716212

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

IMR - Materials Development Division

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

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.

Original language	English
Article number	103702
Journal	Journal of Applied Physics
Volume	101
Issue number	10
DOIs	https://doi.org/10.1063/1.2716212
Publication status	Published - 2007

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10.1063/1.2716212

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title = "Improvement of thermoelectric properties of icosahedral AlPdRe quasicrystals by Fe substitution for Re",

abstract = "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.",

author = "Okada, {Junpei T.} and Takehito Hamamatsu and Shizuka Hosoi and Tomohiro Nagata and Kaoru Kimura and Kazuhiro Kirihara",

note = "Funding Information: This work was supported by a Grant for 21st Century COE Program “Applied Physics on Strong Correlation” from the Ministry of Education, Culture, Sports, Science, and Technology of Japan.",

year = "2007",

doi = "10.1063/1.2716212",

language = "English",

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T1 - Improvement of thermoelectric properties of icosahedral AlPdRe quasicrystals by Fe substitution for Re

AU - Okada, Junpei T.

AU - Hamamatsu, Takehito

AU - Hosoi, Shizuka

AU - Nagata, Tomohiro

AU - Kimura, Kaoru

AU - Kirihara, Kazuhiro

N1 - Funding Information: This work was supported by a Grant for 21st Century COE Program “Applied Physics on Strong Correlation” from the Ministry of Education, Culture, Sports, Science, and Technology of Japan.

PY - 2007

Y1 - 2007

N2 - 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.

AB - 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.

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DO - 10.1063/1.2716212

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VL - 101

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 10

M1 - 103702

ER -

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

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