[1L09-13] Tritium Breeder and Coating Technique

[1L12] Fabrication and characterization of zirconium oxide coating on tubular steel substrate by metal organic decomposition

*Khiem Duy Do¹, Ryosuke Norizuki¹, Hikaru Fujiwara¹, Kento Shirota¹, Teruya Tanaka², Takumi Chikada¹ (1. Shizuoka Univ., 2. NIFS)

Keywords:tritium, permeation, coating, corrosion, zirconium oxide, tube

Ceramic coatings in fusion reactor blankets have been investigated as multifunctional coatings for tritium permeation reduction, electrical insulation, and corrosion protection. Practically, the fabrication of homogeneous ceramic coatings on the fusion blanket components such as ducts and complex-shaped surfaces is challenging. In this work, we fabricated zirconium oxide coatings on 316L type stainless steel tubes of up to 250 mm in length by metal organic decomposition method. The prepared samples were characterized by surface and cross-sectional observations, deuterium permeation measurements, and electrical measurements. Corrosion tests by liquid lithium-lead exposure were also conducted to examine the compatibility of the coating.