| Abstract Scope |
Commercial fusion blankets must ensure high thermal efficiency by high-temperature operation, for instance, using liquid metals or molten salts as tritium breeders. In these blanket concepts, tritium permeation through structural materials, magneto-hydrodynamic pressure drop of liquid metal flow, and corrosion are critical challenges. Functional coating is one of the few promising solutions to mitigate tritium permeation, generation of eddy current in liquid metals and metal components, and corrosion simultaneously. In the last two decades, investigations on functional coatings have progressed experimentally and theoretically with the achievement of relevant properties. The functional coating study proceeds to the next phase: high-performance with highly reliable coating structure. In this presentation, recent achievements and remaining challenges of functional coatings in terms of plant-scale fabrication, hydrogen isotope permeation, liquid metal corrosion, and irradiation effects, are summarized and discussed toward the actual use of the coatings in fusion reactors. |