Home > Publications database > Evaluation of the high temperature oxidation of W-Cr-Zr self-passivating alloys |
Journal Article | FZJ-2021-00910 |
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2019
Elsevier Science
Amsterdam [u.a.]
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Please use a persistent id in citations: http://hdl.handle.net/2128/27105 doi:10.1016/j.corsci.2018.11.022
Abstract: W-Cr-Zr systems with different compositions were oxidized in a mixed gas (Ar + 20 vol.% O2) atmosphere at 1000 °C. The power law which was used to describe the oxidation behaviour, indicates that W-11.2wt.%Cr-1.7wt.%Zr has an excellent oxidation behaviour. As analysed from the ten-hour exposure, W-Cr-Zr thin film oxidation shows a self-passivating stage followed by a linear oxidation stage. Furthermore, a study on the addition of zirconium indicates that zirconia particles act as diffusion barriers for the chromium cation diffusion and another function as the nucleation sites for the formation of the initial oxide scale.
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