Review of Recent Progress in Plasma-Facing Material Joints and Composites in the FRONTIER U.S.-Japan Collaboration

The plasma-facing components (PFCs) of future fusion reactors will have intricate structures and require multiple materials because no one material can simultaneously satisfy all the requirements component. dissimilar joints in PFCs must withstand extreme thermal stress gradients under neutron irradiation. Fusion Research Oriented to Neutron Irradiation Tritium Behavior at Material Interfaces (FRONTIER) U.S.-Japan collaboration seeks explore explain behavior internal solid interfaces first step was identify leading that should be studied further prepare them for next step, which include Different strategies development are being pursued worldwide produce robust PFCs. Here, an overview is presented some most promising areas copper alloys, tungsten-copper composites, tungsten-steel additively manufactured tungsten, particle-reinforced tungsten SiC fiber composites. Each material’s fabrication benefits described, discussion remaining questions given.