Effect of Oxygen on Corrosion of Erbium Oxide in Lithium

Masaru Nagura; Akihiro Suzuki; Takeo Muroga; Takayuki Terai

doi:dx.doi.org/10.13182/FST09-A9015

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Effect of Oxygen on Corrosion of Erbium Oxide in Lithium

Masaru Nagura, Akihiro Suzuki, Takeo Muroga, Takayuki Terai

Fusion Science and Technology / Volume 56 / Number 2 / August 2009 / Pages 841-845

Tritium Breeding / Eighteenth Topical Meeting on the Technology of Fusion Energy (Part 2) / dx.doi.org/10.13182/FST09-A9015

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Er₂O₃ is one promising material for use as an insulating coating in a liquid lithium blanket system. In this study, corrosion of bulk Er₂O₃ in Li with high or low O concentrations was investigated at 600°C. The tests revealed that the corrosion reaction is accelerated under high O condition and suppressed in low O concentration. From these results we assumed the corrosion reaction and tested with more precise condition. The Er₂O₃ bulk specimen corroded significantly in Li with more than 300 ppm O. Control of O concentration is essential for a Li blanket system with an Er₂O₃ coating.