| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1498566 | Scripta Materialia | 2014 | 4 Pages |
Abstract
High-resolution microscopy of a high-purity Ni–5Cr alloy exposed to 360 °C hydrogenated water reveals intergranular selective oxidation of Cr accompanied by local Cr depletion and diffusion-induced grain boundary migration (DIGM). The corrosion-product oxide consists of a porous, interconnected network of Cr2O3 platelets, with no further O ingress into the metal ahead. Extensive grain boundary depletion of Cr (to <0.05 at.%), typically 20–100 nm wide, is observed as a result of DIGM, and reaches depths of many micrometers beyond the oxidation front.
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Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
D.K. Schreiber, M.J. Olszta, S.M. Bruemmer,