Dislocation strain as the mechanism of phonon scattering at grain boundaries. Issue 3 (26th February 2016)

• Record Type: Journal Article
• Authors: Kim, Hyun-Sik; Kang, Stephen D.; Tang, Yinglu; Hanus, Riley; Jeffrey Snyder, G.
• Is Part Of: Materials horizons. Volume 3:Issue 3(2016:May)
• Page Start: 234
• Page End: 240
• Publication Date: 2016-02-26
• Subjects: Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c5mh00299k
• Languages: English
• ISSNs: 2051-6347

Abstract

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. 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.