[2L01-03] Functional Materials

[2L03] Corrosion effect of hydrogen isotope permeation behavior and compatibility between functional ceramics coating and solid tritium breeder

*Wataru Matsuura¹, Akiyoshi Suzuki¹, Julia M Leys², Takumi Chikada¹ (1. Shizuoka Univ., 2. Karlsruher Institut fur technologie)

Keywords:coating, blanket, solid tritium breeder, corrosion

In a fusion reactor blanket system, functional coatings have been developed to reduce tritium permeation and corrosion by tritium breeders. Ceramic coatings have been shown high hydrogen isotope permeation reduction performance, while there is a limited number of studies to investigate the corrosion effect on the hydrogen permeation behavior of the coating. In this presentation, the corrosion effects of solid breeder pebbles on hydrogen isotope permeation behavior of the functional coatings are reported through deuterium permeation tests with the solid breeder consisting of lithium metatitanate and lithium zirconate. The solid breeder was contacting the ZrO₂ coatings on a reduced activation ferritic/martensitic steel plate to simulate the circumstance of the fusion reactor.