b'Figure 3. Mesoscale thermal diffusivity of the SiC-SiC/Sn/Mo surrogate fuel design at various temperatures. The optical microscopy inset is the approximate area of TCM measurements on the length given on the x-axisargon purge to allow the sample to get to 300C, well above the liquid Sn transition. The state-of-the-art techniques developed for thermal conductivity measurement of composite/layered materials Future work on this study willin curved geometries are critical to enable the post-include bulk thermal diffusivityirradiation examination and qualification of novel cladding measurement of the SiC-SiC/Sn/ concepts such as SiC-SiC composites.Mo surrogate fuel design across the radius using the LFA method up to 300C as well as the measurement of thermal diffusivity of liquid Sn.2023|AFC ACCOMPLISHMENTS 65'