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Dislocation strain as the mechanism of phonon scattering at grain boundaries

Kim, Hyun-Sik and Kang, Stephen D. and Tang, Yinglu and Hanus, Riley and Snyder, G. Jeffrey (2016) Dislocation strain as the mechanism of phonon scattering at grain boundaries. Materials Horizons, 3 (3). pp. 234-240. ISSN 2051-6347. doi:10.1039/c5mh00299k. https://resolver.caltech.edu/CaltechAUTHORS:20160531-105536060

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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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1039/c5mh00299kDOIArticle
http://pubs.rsc.org/en/Content/ArticleLanding/2016/MH/C5MH00299KPublisherArticle
ORCID:
AuthorORCID
Snyder, G. Jeffrey0000-0003-1414-8682
Additional Information:© 2016 The Royal Society of Chemistry. Received 14 Dec 2015, Accepted 22 Feb 2016, First published online 26 Feb 2016. The authors would like to acknowledge funding from the Solid-State Solar-Thermal Energy Conversion Center (S3TEC), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award # DE-SC0001299. H.-S. Kim gratefully acknowledge financial support from Samsung Advanced Institute of Technology (SAIT). The authors would like to acknowledge useful discussions with Dr. Zachary Gibbs.
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0001299
Samsung Advanced Institute of Technology (SAIT)UNSPECIFIED
Issue or Number:3
DOI:10.1039/c5mh00299k
Record Number:CaltechAUTHORS:20160531-105536060
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20160531-105536060
Official Citation:Dislocation strain as the mechanism of phonon scattering at grain boundaries Hyun-Sik Kim, Stephen D. Kang, Yinglu Tang, Riley Hanus and G. Jeffrey Snyder Mater. Horiz., 2016,3, 234-240 DOI: 10.1039/C5MH00299K
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:67495
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:31 May 2016 22:52
Last Modified:11 Nov 2021 00:33

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