Initial oxidation of Fe-Al and Fe-Cr-Al alloys: Cr as an alumina booster

Details Initial oxidation of Fe-Al and Fe-Cr-Al alloys: Cr as an alumina booster Initial oxidation of Fe-Al and Fe-Cr-Al alloys: Cr as an alumina booster

2011-02-04

arxiv.org/abs/1102.0912v1

Physics

Condensed Matter

Materials Science

9 pages, 6 figures

Scientific paper

The boosting effect of Cr on the growth of the protective alumina scale on Fe-Al alloys is investigated by x-ray photoelectron spectroscopy. Using low oxygen pressure the surface chemistry of the alloys is monitored starting from the first moments of oxidation. Chromium effect on the Fe-Al surface-bulk exchange is clearly detected by analyzing the measured surface concentrations within the atomic concentration models. Previous ab initio calculations agree well with the present experiments.

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