Oxide structure of air-passivated U-6Nb alloy thin films

Watkins, Erik B.; Kruk, Irena; Majewski, Jarosław; Allred, David D.

doi:10.1016/j.jnucmat.2020.152356

Cited by 9 publications

(2 citation statements)

References 17 publications

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“…Relatively few NR investigations focus on surface films formed in air under ambient conditions. ,,,, The air-formed film on iron was recently investigated by NR and PNR supported by XRR . Iron was deposited on quartz, providing a smooth surface.…”

Section: Case Studiesmentioning

confidence: 99%

“…This was ascribed to the thinness of the air-formed film. Watkins et al 51 followed the formation of a passivating oxide layer on U(92%)-Nb(6%) alloy films, by NR and XRR measurements, both at early oxidation and after one year. Combined analyses by NR, XRR, SEM/EDX, and X-ray diffraction revealed that the film consisted of a 30−35 nm UO 2 top-layer and an inner Nb 2 O 5 layer.…”

Section: Nr Studies Of Oxide Film Formation On Metals In Air and In O...mentioning

confidence: 99%

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Neutron Reflectivity in Corrosion Research on Metals

Karlsson,

Johansson,

Mazzei

et al. 2024

ACS Mater. Au

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Neutron reflectivity (NR) is potentially a powerful tool for characterizing chemical and morphological changes in thin films and at buried interfaces in corrosion science. While the scope of NR is limited by its inherent demands for low surface roughness and high sample planarity, these drawbacks are compensated for by the unique ability to detect light elements and distinguish between isotopes. Furthermore, the generally weak absorption of neutrons by matter allows the use of bulky sample environments and in situ experiments. In particular, the layer thickness range of 3–100 nm accessible by NR is appropriate for studying air-formed films and passive films, which are crucial for the ability of metallic materials to resist corrosion, as well as for investigating the interaction of metal surfaces with hydrogen and its compounds, e.g., water. Also, NR is suitable for studying early stages of oxide growth on metals at high temperature, including the transition from Cabrera–Mott-type films to Wagner-type growth. Here, we outline key characteristics of NR as applied to the study of corrosion of metals, exemplified by earlier work, and discuss perspectives for future work in the field. The aim of our work is to stimulate the application of the unique capabilities of NR to corrosion science.

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