Thermal Transport At (001) Twist Grain Boundaries in UO₂

Author

Bowen Deng
Aleksandr V. Chernatynskiy, Missouri University of Science and TechnologyFollow
Susan Sinnott
Simon R. Phillpot

Abstract

We use phonon wave-packet dynamics to study the phonon transmission at UO₂ twist grain boundaries as a function of phonon frequency, mode and incident angle. We find that grain boundaries with more disordered structures show stronger phonon transmission than more ordered grain boundaries. The transmission coefficients are used to calculate the grain boundary thermal conductance at elevated temperature.

Recommended Citation

B. Deng et al., "Thermal Transport At (001) Twist Grain Boundaries in UO₂," Journal of Nuclear Materials, vol. 479, pp. 167 - 173, Elsevier, Oct 2016.

The definitive version is available at https://doi.org/10.1016/j.jnucmat.2016.06.054

Department(s)

Physics

Research Center/Lab(s)

Center for High Performance Computing Research

Keywords and Phrases

Phonons; Disordered Structures; Elevated Temperature; Ordered Grain Boundaries; Phonon Transmissions; Phonon Wave Packets; Thermal Conductance; Transmission Coefficients; Twist Grain Boundary; Grain Boundaries

International Standard Serial Number (ISSN)

0022-3115

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2016 Elsevier, All rights reserved.

Publication Date

01 Oct 2016