Kapitza Resistance of the Grain Boundaries in Ceria

Journal Article · Sun Jun 01 00:00:00 EDT 2014 · Transactions of the American Nuclear Society,

OSTI ID:1156927

Bai, David; Gan, Jian; Chernatynskiy, Aleksandr

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.

• Research Organization: Idaho National Laboratory (INL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC07-05ID14517
• OSTI ID: 1156927
• Report Number(s): INL/JOU-14-33091
• Journal Information: Transactions of the American Nuclear Society,, Journal Name: Transactions of the American Nuclear Society, Vol. 110
• Country of Publication: United States
• Language: English

Related Subjects

Thermal Conductivity
Grain Boundaries