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Title: Kapitza Resistance of the Grain Boundaries in Ceria

Thermal conductivity is one of the key performance metrics of the nuclear fuels. In electrical insulators, such as most ubiquitous nuclear fuel – UO2, thermal transport is due to phonons, or lattice waves. Their propagation is impeded by any lattice defect, such as impurities or vacancies, as well as larger microstructural features: grain boundaries, dislocations and pores/bubbles. Detailed description of the phonons interactions with these features is still lacking. In this work, we elucidate the dependence of the grain boundary thermal resistance, also known as a Kapitza resistance, on the type and misorientation angle of the grain boundary in model system of CeO2.
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Resource Type:
Journal Article
Resource Relation:
Journal Name: Transactions of the American Nuclear Society,; Journal Volume: 110
Research Org:
Idaho National Laboratory (INL)
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Country of Publication:
United States
Thermal Conductivity, Grain Boundaries