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

被引：25
|
作者：
Ikeda, Teruyuki [1 ]
Toberer, Eric S. [1 ]
Ravi, Vilupanur A. [2 ]
Snyder, G. Jeffrey [1 ]
Aoyagi, Shinobu [3 ]
Nishibori, Eiji [3 ]
Sakata, Makoto [3 ]
机构：
[1] CALTECH, Pasadena, CA 91125 USA
[2] Calif State Polytech Univ Pomona, Pomona, CA 91768 USA
[3] Nagoya Univ, Nagoya, Aichi 4648603, Japan
来源：
SCRIPTA MATERIALIA | 2009年 / 60卷 / 05期
关键词：
Annealing; Synchrotron radiation; Decomposition; Phase transformation kinetics; Thermoelectric materials; SB2TE3;
D O I：
10.1016/j.scriptamat.2008.10.024
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
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 (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：321 / 324
页数：4
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