Limits on irradiation-induced thermal conductivity and electrical resistivity in silicon carbide materials

Property tailorability for advanced CVI silicon carbide composites for fusion

“…The saturated defect thermal resistance is linearly dependent on the irradiation temperature at 300-800 • C [15] and the data could be fitted to the equation below: Fig. 5 presents the post-irradiation thermal conductivity at the irradiation temperature calculated using Eq.…”

SiC/SiC composites through transient eutectic-phase route for fusion applications

“…The thermal conductivity of NITE SiC/SiC composites shown in Table 1 is for an unirradiated condition and should undergo a significant reduction after neutron irradiation depending on temperature. The magnitude of primary thermal resistance of NITE SiC/SiC, which comes from grain boundaries and impurities, will probably be comparable with the anticipated thermal resistance added by neutron irradiation in most fusion conditions [16]. Therefore, improving the unirradiated thermal conductivity should significantly improve the irradiated thermal conductivity.…”

Radiation induced electrical and microstructural degradation at high temperature for HP SiC

“…Measurements of the electrical conductivity for different types of SiC show an extremely high spread of values, ranging from about 10 S/m down to less than 10 −5 S/m [3,11,12]. In particular here we observe important differences between two different batches of nominally equal material obtained from the same company, and even between samples cut from the same batch.…”