Dislocation strain as the mechanism of phonon scattering at grain boundaries

Hyun Sik Kim; Stephen D. Kang; Yinglu Tang; Riley Hanus; G. Jeffrey Snyder

doi:10.1039/c5mh00299k

Dislocation strain as the mechanism of phonon scattering at grain boundaries

Hyun Sik Kim
, Stephen D. Kang
, Yinglu Tang
, Riley Hanus
, G. Jeffrey Snyder

Department of Materials Science and Engineering

Northwestern University
California Institute of Technology
Swiss Federal Laboratories for Materials Science and Technology (Empa)

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

143 Scopus citations

Abstract

Thermal conductivities of polycrystalline thermoelectric materials are satisfactorily calculated by replacing the commonly used Casimir model (freqeuncy-independent) with grain boundary dislocation strain model (frequency-dependent) of Klemens. It is demonstrated that the grain boundaries are better described as a collection of dislocations rather than perfectly scattering interfaces.

Original language	English
Pages (from-to)	234-240
Number of pages	7
Journal	Materials Horizons
Volume	3
Issue number	3
DOIs	https://doi.org/10.1039/c5mh00299k
State	Published - May 2016

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title = "Dislocation strain as the mechanism of phonon scattering at grain boundaries",

abstract = "Thermal conductivities of polycrystalline thermoelectric materials are satisfactorily calculated by replacing the commonly used Casimir model (freqeuncy-independent) with grain boundary dislocation strain model (frequency-dependent) of Klemens. It is demonstrated that the grain boundaries are better described as a collection of dislocations rather than perfectly scattering interfaces.",

author = "Kim, \{Hyun Sik\} and Kang, \{Stephen D.\} and Yinglu Tang and Riley Hanus and \{Jeffrey Snyder\}, G.",

note = "Publisher Copyright: {\textcopyright} 2016 The Royal Society of Chemistry.",

year = "2016",

month = may,

doi = "10.1039/c5mh00299k",

language = "English",

volume = "3",

pages = "234--240",

journal = "Materials Horizons",

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TY - JOUR

T1 - Dislocation strain as the mechanism of phonon scattering at grain boundaries

AU - Kim, Hyun Sik

AU - Kang, Stephen D.

AU - Tang, Yinglu

AU - Hanus, Riley

AU - Jeffrey Snyder, G.

PY - 2016/5

Y1 - 2016/5

N2 - Thermal conductivities of polycrystalline thermoelectric materials are satisfactorily calculated by replacing the commonly used Casimir model (freqeuncy-independent) with grain boundary dislocation strain model (frequency-dependent) of Klemens. It is demonstrated that the grain boundaries are better described as a collection of dislocations rather than perfectly scattering interfaces.

AB - Thermal conductivities of polycrystalline thermoelectric materials are satisfactorily calculated by replacing the commonly used Casimir model (freqeuncy-independent) with grain boundary dislocation strain model (frequency-dependent) of Klemens. It is demonstrated that the grain boundaries are better described as a collection of dislocations rather than perfectly scattering interfaces.

UR - https://www.scopus.com/pages/publications/84967155776

U2 - 10.1039/c5mh00299k

DO - 10.1039/c5mh00299k

M3 - Article

AN - SCOPUS:84967155776

SN - 2051-6347

VL - 3

SP - 234

EP - 240

JO - Materials Horizons

JF - Materials Horizons

IS - 3

ER -

Dislocation strain as the mechanism of phonon scattering at grain boundaries

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