In situ observation of eutectoid reaction forming a PbTe-Sb2Te3 thermoelectric nanocomposite by synchrotron X-ray diffraction

Teruyuki Ikeda; Eric S. Toberer; Vilupanur A. Ravi; G. Jeffrey Snyder; Shinobu Aoyagi; Eiji Nishibori; Makoto Sakata

doi:10.1016/j.scriptamat.2008.10.024

In situ observation of eutectoid reaction forming a PbTe-Sb₂Te₃ thermoelectric nanocomposite by synchrotron X-ray diffraction

Teruyuki Ikeda, Eric S. Toberer, Vilupanur A. Ravi, G. Jeffrey Snyder^*, Shinobu Aoyagi, Eiji Nishibori, Makoto Sakata

^*Corresponding author for this work

Materials Science and Engineering

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

27 Scopus citations

Abstract

In situ high-temperature powder X-ray diffraction experiments have been performed on Pb_10.5Sb_31.6Te_57.9 using a synchrotron X-ray source to observe the eutectoid reaction from Pb₂Sb₆Te₁₁ to PbTe and Sb₂Te₃. Molar fractions of the constituent phases and fraction transformed were obtained as functions of time. The experimental fraction transformed vs. time curve were well fitted by the Kolmogorov-Johnson-Mehl-Avrami equation with an Avrami index n = 1.4. The small n value suggests that the growth of the new phases PbTe and Sb₂Te₃ is one-dimensional.

Original language	English (US)
Pages (from-to)	321-324
Number of pages	4
Journal	Scripta Materialia
Volume	60
Issue number	5
DOIs	https://doi.org/10.1016/j.scriptamat.2008.10.024
State	Published - Mar 1 2009

Keywords

Annealing
Decomposition
Phase transformation kinetics
Synchrotron radiation
Thermoelectric materials

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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@article{5767513f941a468497ed2e722871ed91,

title = "In situ observation of eutectoid reaction forming a PbTe-Sb2Te3 thermoelectric nanocomposite by synchrotron X-ray diffraction",

abstract = "In situ high-temperature powder X-ray diffraction experiments have been performed on Pb10.5Sb31.6Te57.9 using a synchrotron X-ray source to observe the eutectoid reaction from Pb2Sb6Te11 to PbTe and Sb2Te3. Molar fractions of the constituent phases and fraction transformed were obtained as functions of time. The experimental fraction transformed vs. time curve were well fitted by the Kolmogorov-Johnson-Mehl-Avrami equation with an Avrami index n = 1.4. The small n value suggests that the growth of the new phases PbTe and Sb2Te3 is one-dimensional.",

keywords = "Annealing, Decomposition, Phase transformation kinetics, Synchrotron radiation, Thermoelectric materials",

author = "Teruyuki Ikeda and Toberer, {Eric S.} and Ravi, {Vilupanur A.} and {Jeffrey Snyder}, G. and Shinobu Aoyagi and Eiji Nishibori and Makoto Sakata",

year = "2009",

month = mar,

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doi = "10.1016/j.scriptamat.2008.10.024",

language = "English (US)",

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journal = "Scripta Materialia",

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In situ observation of eutectoid reaction forming a PbTe-Sb₂Te₃ thermoelectric nanocomposite by synchrotron X-ray diffraction. / Ikeda, Teruyuki; Toberer, Eric S.; Ravi, Vilupanur A.; Jeffrey Snyder, G.; Aoyagi, Shinobu; Nishibori, Eiji; Sakata, Makoto.

In: Scripta Materialia, Vol. 60, No. 5, 01.03.2009, p. 321-324.

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

TY - JOUR

T1 - In situ observation of eutectoid reaction forming a PbTe-Sb2Te3 thermoelectric nanocomposite by synchrotron X-ray diffraction

AU - Ikeda, Teruyuki

AU - Toberer, Eric S.

AU - Ravi, Vilupanur A.

AU - Jeffrey Snyder, G.

AU - Aoyagi, Shinobu

AU - Nishibori, Eiji

AU - Sakata, Makoto

PY - 2009/3/1

Y1 - 2009/3/1

N2 - In situ high-temperature powder X-ray diffraction experiments have been performed on Pb10.5Sb31.6Te57.9 using a synchrotron X-ray source to observe the eutectoid reaction from Pb2Sb6Te11 to PbTe and Sb2Te3. Molar fractions of the constituent phases and fraction transformed were obtained as functions of time. The experimental fraction transformed vs. time curve were well fitted by the Kolmogorov-Johnson-Mehl-Avrami equation with an Avrami index n = 1.4. The small n value suggests that the growth of the new phases PbTe and Sb2Te3 is one-dimensional.

AB - In situ high-temperature powder X-ray diffraction experiments have been performed on Pb10.5Sb31.6Te57.9 using a synchrotron X-ray source to observe the eutectoid reaction from Pb2Sb6Te11 to PbTe and Sb2Te3. Molar fractions of the constituent phases and fraction transformed were obtained as functions of time. The experimental fraction transformed vs. time curve were well fitted by the Kolmogorov-Johnson-Mehl-Avrami equation with an Avrami index n = 1.4. The small n value suggests that the growth of the new phases PbTe and Sb2Te3 is one-dimensional.

KW - Annealing

KW - Decomposition

KW - Phase transformation kinetics

KW - Synchrotron radiation

KW - Thermoelectric materials

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