Lithium-lead corrosion behavior of erbium oxide, yttrium oxide and zirconium oxide coatings fabricated by metal organic decomposition

Corrosion tests of multi-layer ceramic coatings in liquid lithium-lead

“…The corrosion of the outermost Er2O3 layer was confirmed by surface roughness after the Li-Pb exposure at 500-600 ºC. A corrosion process would be that Er2O3 was dissolved by a reaction with lithium and dissolved oxygen as proposed in the references [5,10]:…”

“…In liquid blanket concepts, however, corrosion of the coatings by liquid tritium breeders such as lithiumlead (Li-Pb) is an unavoidable problem. In our previous study, corrosion and peelings were confirmed after static Li-Pb exposure tests in single-layer coatings [5]. On the other hand, two-layer coatings consisting of Er2O3 and ZrO2 were proposed as multi-functional coatings [6].…”

“…In particular, oxygen is considered to have a significant effect on Li-Pb compatibility. In this study, Li-Pb was synthesized and the samples were soaked into Li-Pb under a low oxygen concentration environment (<1 vol% at atmospheric pressure) as described in our previous study [5]. From the oxygen concentration of the environment in the glove box and the ingots, we assume that Li-Pb used in this study contained 1000-10000 appm oxygen.…”

Gamma-ray irradiation effect on deuterium retention in reduced activation ferritic/martensitic steel and ceramic coatings

“…ZrO2 coatings were fabricated by metal organic decomposition (MOD) after the formation of a chromium oxide (Cr2O3) layer that improves adhesion between the coating and the substrate [9]. The MOD procedure followed the previous paper [10]. The Cr2O3-formed substrates were dipped into a ZrO2 precursor (Kojundo Chemical Laboratory Co., Ltd., SYM-ZR04®, Zr concentration: 0.4 mol/L) and withdrawn at a constant speed of 1.0 mm s −1 , followed by drying at 150 ºC for 6 min and preheating at 550 ºC for 2 min in air using hot plates.…”

Deuterium permeation behavior through yttria-stabilized zirconia coating fabricated by magnetron sputtering

“…Ceramics such as zirconium oxide (ZrO2) and yttrium oxide (Y2O3) have been considered as candidate materials for TPB [3,4]. In particular, ZrO2 coatings showed high permeation reduction performance as well as high compatibility with liquid tritium breeders such as lithium-lead [5]. However, it was also found that the deterioration of the coating such as cracking occurred at high temperatures [3].…”