Abstract

The results from recent studies on radiation-induced changes in the electrical conductivity, loss tangent, and thermal conductivity of ceramics are reviewed, with particular emphasis on in-situ data obtained during irradiation. The in-situ measurements have found that the physical property degradation during irradiation is generally much more severe than indicated by post-irradiation measurements. In particular, permanent degradation in the electrical resistivity may occur after irradiation to damage levels of -3 displacements per atom (dpa) for temperatures near 450°C. This radiation-induced electrical degradation (RIED) is observed only if an electric field is applied during the irradiation.

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