The high-temperature elastic moduli of polycrystalline PbTe measured by resonant ultrasound spectroscopy

被引：61

作者：

Ren, Fei ^{[1
]}

Case, Eldon D. ^{[1
]}

Sootsman, Joseph R. ^{[2
]}

Kanatzidis, Mercouri G. ^{[2
]}

Kong, Huijun ^{[3
]}

Uher, Ctirad ^{[3
]}

Lara-Curzio, Edgar ^{[4
]}

Trejo, Rosa M. ^{[4
]}

机构：

[1] Michigan State Univ, Dept Chem Engn & Mat Sci, E Lansing, MI 48824 USA

[2] Northwestern Univ, Dept Chem, Evanston, IL USA

[3] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

[4] Oak Ridge Natl Lab, High Temp Mat Lab, Oak Ridge, TN 37831 USA

来源：

ACTA MATERIALIA | 2008年 / 56卷 / 20期

关键词：

Semiconductor compounds; Dynamic mechanical analysis; Elastic behavior; Temperature-dependent;

D O I：

10.1016/j.actamat.2008.07.055

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The thermoelectric material PbTe has been used in a wide variety of power generator applications. However, there is limited mechanical property data available for PbTe for temperatures above room temperature. This paper reports dynamic elastic moduli measured via resonant ultrasound spectroscopy on undoped and PbI2-doped polycrystalline PbTe between room temperature and 773 K; in addition, the room temperature carrier concentration was measured by a Hall effect experiment. The Young's modulus and shear modulus of PbTe decreased linearly with temperature above room temperature, while the Poisson's ratio exhibited either monotonic increase or decrease with temperature. The Young's modulus and shear modulus values obtained during heating and cooling agreed to within 1%. The dynamic elastic moduli data obtained in this Study compared well in general with literature data. The difference observed between the current Study and other literature studies is explained in terms of the carrier concentration effect on elastic moduli. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：5954 / 5963

页数：10

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