Status and prospects of SiC-based ceramic composites for fusion and advanced fission applications

The present status and future prospects of silicon carbide (SiC) continuous fiber-reinforced SiC-matrix ceramic composites (SiC/SiC composites) is reviewed from the viewpoint of material development for applications to blanket/first wall structures in fusion power devices and other advanced nuclear systems. Emphases are placed on the directions of neutron-tolerant composite development. A rationalization of thermal conductivity limits for SiC/SiC composites is provided. It is concluded that, although today's state-of-the-art SiC/SiC can contribute to 'attractive' fusion power, the expected emergence of novel composites shall further justify taking the risk of employing untraditional materials. (author)