[2B10-14] Blanket Materials/Coating

3:45 PM - 4:00 PM JST(6:45 AM - 7:00 AM UTC)

[2B14] Examination of electrical insulating performances of Y₂O₃ coatings by in-situ measurement under deuterium ion beam irradiation

*Satoru Toyoda¹, Teruya Tanaka^2,1, Shingo Tamaki³, Fuminobu Sato³, Isao Murata³ (1. Nagoya Univ., 2. NIFS, 3. Osaka Univ.)

Keywords:

ceramic coatings,ion beam irradiation,displacement of atoms,electrical insulating performance

In-situ examination of electrical insulating performances under ion-beam irradiation has been started for ceramic coatings developed for liquid metal blanket systems by using the 250 keV deutron beam line of OKTAVIAN at Osaka University. While a Y₂O₃ coating sample has been irradiated up to approximately 10^-1 dpa at 400-500 ℃ with the applied electrical field of 0.1 V/µm, significant increase of the conductivity (i.e., decrease of the insulating performance) has not been observed. Further examination with higher irradiation damage levels and higher electrical field strengths are planned to be performed. The applicability of Y₂O₃ coatings to the liquid metal blanket systems will be discussed from the relation between the irradiation damage levels and insulating performance.