[2H14-18] Fusion Material Engineering 2

[2H15] Characterization of multifunctional ceramic coating on steel pipe fabricated by metal organic decomposition

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

Keywords:tritium, permeation, pipe, corrosion, zirconium oxide

In fusion reactor blankets, multifunctional coatings have been investigated for tritium permeation reduction, electrical insulation, and corrosion protection. In terms of sustainable development, it is critical to establish a ceramic coating technique on the inner wall of complicated components in liquid metal blankets. In this research, we initially achieved to form homogeneous zirconium oxide coatings on the inner wall of 316L type stainless steel pipes of up to 250 mm in length by metal organic decomposition method. Subsequently, characterizations of coated pipes were investigated by elemental analysis and cross-sectional observations, deuterium permeation measurements, and electrical measurements. The compatibility of the coating with the liquid metal was examined by liquid lithium-lead exposure at high temperatures for a prolonged time.