Deuterium permeation behavior in iron-irradiated erbium oxide coating

•Deuterium permeation through Er2O3-coated F82H irradiated by Fe3+ at 600°C was examined.•The permeability varied by damage concentration and annealing time at 300–500°C.•Irradiated coatings showed 50–80% lower permeability than unirradiated at 550–700°C.•Mechanisms of defect accumulation and recove...

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