Phase transformation of oxide film in zirconium alloy in high temperature hydrogenated water

Kim, Sang Woo; Kim, Jong-Jin; Choi, Kyoung Joon; Yoo, Seung Chang; Kim, Seung Hyun; Kim, Ji Hyun

doi:10.1016/j.corsci.2015.06.034

Cited by 43 publications

(5 citation statements)

References 59 publications

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“…Recently, Kim et al . used in-situ Raman spectroscopy to confirm the phase transformation of oxide film on zirconium alloy surface under hydrothermal conditions9.…”

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confidence: 99%

The Hydration Structure at Yttria-Stabilized Cubic Zirconia (110)-Water Interface with Sub-Ångström Resolution

Hou

Kim

et al. 2016

Sci Rep

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The interfacial hydration structure of yttria-stabilized cubic zirconia (110) surface in contact with water was determined with ~0.5 Å resolution by high-resolution X-ray reflectivity measurement. The terminal layer shows a reduced electron density compared to the following substrate lattice layers, which indicates there are additional defects generated by metal depletion as well as intrinsic oxygen vacancies, both of which are apparently filled by water species. Above this top surface layer, two additional adsorbed layers are observed forming a characteristic interfacial hydration structure. The first adsorbed layer shows abnormally high density as pure water and likely includes metal species, whereas the second layer consists of pure water. The observed interfacial hydration structure seems responsible for local equilibration of the defective surface in water and eventually regulating the long-term degradation processes. The multitude of water interactions with the zirconia surface results in the complex but highly ordered interfacial structure constituting the reaction front.

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“…Recently, Kim et al . used in-situ Raman spectroscopy to confirm the phase transformation of oxide film on zirconium alloy surface under hydrothermal conditions9.…”

mentioning

confidence: 99%

The Hydration Structure at Yttria-Stabilized Cubic Zirconia (110)-Water Interface with Sub-Ångström Resolution

Hou

Kim

et al. 2016

Sci Rep

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“…The t-ZrO 2 is assumed to form a protective layer, which transforms to m-ZrO 2 during the kinetic transition. This transformation is accompanied by tension release and a change in specific volume of oxide, which leads to the development of microcracks and micropores inside the protective layer, resulting in exposure of metal underneath [28,29].…”

Section: Discussionmentioning

confidence: 99%

Raman study of oxide layers on zirconium alloys using ¹⁸O tracers

Sialini

Sajdl

Dobrovolný

2020

Corrosion Engineering, Science and Technology

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In this work, samples of zirconium alloys Zr1Nb and Zircaloy-4W were subjected to two-stage oxidation experimentsat first in H 2 16 O solution and then in H 2 18 O steam. Raman spectroscopy was used to analyse distribution of 18 O isotope in corrosion layers of the alloys. Layered distribution of 18 O was observed in case of Zr1Nb samples; Zircaloy-4W had 18 O present only at metal/oxide interface. This observation is attributed to differing kinetic transitions, which influence transport of oxygen through oxide layer.

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“…Also, the mechanical properties of the corroded samples were reduced as compared to the as-received samples. Kim et al [11] performed the corrosion test on the zirconium alloy in a hydrogenated water environment at 325 • C. The oxide layer formed on the alloy surface is mainly comprised of monoclinic ZrO 2 . The authors observed the tetragonal to monoclinic ZrO 2 phase transformation.…”

Section: Research Backgroundmentioning

confidence: 99%

Accelerated Formation of Oxide Layers on Zircaloy-4 Utilizing Air Oxidation and Comparison with Water-Corroded Oxide Layers

Muthu,

Lee,

Okonkwo

et al. 2023

Materials

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For the dry storage of Canada Deuterium Uranium (CANDU) spent nuclear fuels, the integrity of Zircaloy-4 fuel cladding has to be verified. However, the formation of ~10 µm-thick oxide layers in typical CANDU reactor operating conditions takes several years, which makes sample preparation a slow process. To overcome such limitations, in this study, an accelerated formation of an oxide layer on Zircaloy-4 cladding tube was developed with a combination of high-temperature water corrosion (HT-WC) and air oxidation (AO). First, Zircaloy-4 tubes were corroded in oxygenated (2 ppm dissolved oxygen) high-temperature water (360 °C/19.5 MPa) for 500 h. Then, the tubes were air-oxidized at 500 °C for 30 h. Finally, the tubes were corroded again in HT-WC for 500 h to produce ~10 µm-thick oxide layers. The morphology and characteristics of the oxide layer in each step were analyzed using X-ray diffraction, scanning and transmission electron microscopy. The results showed that the oxide layer formed in the accelerated method was comparable to that formed in HT-WC in terms of morphology and oxide phases. Thus, the accelerated oxide formation method can be used to prepare an oxidized Zircaloy-4 cladding tube for CANDU fuel integrity analysis.

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Phase transformation of oxide film in zirconium alloy in high temperature hydrogenated water

Cited by 43 publications

References 59 publications

The Hydration Structure at Yttria-Stabilized Cubic Zirconia (110)-Water Interface with Sub-Ångström Resolution

The Hydration Structure at Yttria-Stabilized Cubic Zirconia (110)-Water Interface with Sub-Ångström Resolution

Raman study of oxide layers on zirconium alloys using ¹⁸O tracers

Accelerated Formation of Oxide Layers on Zircaloy-4 Utilizing Air Oxidation and Comparison with Water-Corroded Oxide Layers

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Phase transformation of oxide film in zirconium alloy in high temperature hydrogenated water

Cited by 43 publications

References 59 publications

The Hydration Structure at Yttria-Stabilized Cubic Zirconia (110)-Water Interface with Sub-Ångström Resolution

The Hydration Structure at Yttria-Stabilized Cubic Zirconia (110)-Water Interface with Sub-Ångström Resolution

Raman study of oxide layers on zirconium alloys using 18O tracers

Accelerated Formation of Oxide Layers on Zircaloy-4 Utilizing Air Oxidation and Comparison with Water-Corroded Oxide Layers

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Raman study of oxide layers on zirconium alloys using ¹⁸O tracers