Gamma-ray-induced migration of hydrogen isotopes in zirconium oxide coatings at room temperature. (1st December 2022)

• Record Type: Journal Article
• Authors: Chikada, Takumi; Nakazawa, Shota; Wilde, Markus; Inami, Wataru; Kawata, Yoshimasa
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 93(2022)
• Page Start: 39619
• Page End: 39625
• Publication Date: 2022-12-01
• Subjects: Hydrogen retention -- Hydrogen diffusion -- Gamma-ray irradiation -- Ceramic coating -- Isotopic effect; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.09.103
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Hydrogen in materials is scientifically and technologically critical due to its unique behavior and large impact on material properties. Here, we report the migration of hydrogen isotopes in ceramic coatings induced by gamma-ray irradiation at room temperature. Nuclear reaction analysis performed simultaneously on hydrogen and deuterium reveals that residual hydrogen isotope impurities in zirconium oxide coatings fabricated by metal organic decomposition exist in the form of both stable and mobile species, whereas coatings made by magnetron sputtering contain only stable ones. The concentrations of mobile hydrogen and deuterium in the coating interior decrease significantly with the gamma-ray dose, whereas those of the stable species do not. An external hydrogen gas atmosphere prevents the depletion of mobile hydrogen and deuterium during the irradiation. This work opens a new strategy to transport and remove hydrogen isotopes from materials without elevated temperature. Graphical abstract: Image 1 Highlights: Hydrogen migration were induced by gamma-ray irradiation at room temperature. Hydrogen exists in ZrO2 coatings in the form of stable and mobile species. Migration depends on the hydrogen isotopes' bound states and irradiation dosage. A hydrogen atmosphere suppressed migration of mobile species during irradiation.