Visualizing oxygen transport pathways during intergranular oxidation in Ni-Cr
Weiser M, Olszta MJ, Engelhard MH, Zhu Z, Schreiber DK (2023)
Publication Type: Journal article
Publication year: 2023
Journal
Book Volume: 7
Article Number: 70
Issue: 1
DOI: 10.1038/s41529-023-00387-w
Abstract
The transport paths of O during intergranular oxidation in binary Ni-Cr were investigated. To isolate the selective oxidation of Cr, oxidation was performed with a CO/CO2 gas mixture in which the oxygen partial pressure was kept under the NiO dissociation pressure. A combination of electron microscopy and atom probe tomography (APT) was used to study the nanometer-scale details of the passivation and penetrative intergranular oxidation processes at high-energy grain boundaries. Oxygen transport towards the terminating oxidation front is elucidated with dedicated usage of oxygen tracer exchange experiments. Secondary ion mass spectroscopy and APT support classical theories of internal oxidation, revealing preferred transport paths at the oxide/alloy interface with sub-nanometer resolution.
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APA:
Weiser, M., Olszta, M.J., Engelhard, M.H., Zhu, Z., & Schreiber, D.K. (2023). Visualizing oxygen transport pathways during intergranular oxidation in Ni-Cr. npj Materials Degradation, 7. https://doi.org/10.1038/s41529-023-00387-w
MLA:
Weiser, Martin, et al. "Visualizing oxygen transport pathways during intergranular oxidation in Ni-Cr." npj Materials Degradation 7 (2023).
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