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

Ikeda, Teruyuki and Toberer, Eric S. and Ravi, Vilupanur A. and Snyder, G. Jeffrey and Aoyagi, Shinobu and Nishibori, Eiji and Sakata, Makoto (2009) In situ observation of eutectoid reaction forming a PbTe-Sb₂Te₃ thermoelectric nanocomposite by synchrotron X-ray diffraction. Scripta Materialia, 60 (5). pp. 321-324. ISSN 1359-6462. https://resolver.caltech.edu/CaltechAUTHORS:IKEsm09

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Abstract

In situ high-temperature powder X-ray diffraction experiments have been performed on performed on Pb10.5Sb6Te57.9 using 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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.scriptamat.2008.10.024DOIUNSPECIFIED
http://www.scriptamat.org/article/S1359-6462(08)00767-7/abstractPublisherUNSPECIFIED
ORCID:
AuthorORCID
Ikeda, Teruyuki0000-0001-7076-6958
Snyder, G. Jeffrey0000-0003-1414-8682
Additional Information:© 2008 Elsevier. Received 19 September 2008; revised 21 October 2008; accepted 26 October 2008. Available online 5 November 2008.
Subject Keywords:Annealing; Synchrotron radiation; Decomposition; Phase transformation kinetics; Thermoelectric materials
Issue or Number:5
Record Number:CaltechAUTHORS:IKEsm09
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:IKEsm09
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:13441
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:22 Apr 2009 20:55
Last Modified:03 Oct 2019 00:38

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