Segregation at the Al{sub 2}O{sub 3}-FeCrAl interface during high-temperature oxidation
- Univ. of California, Santa Barbara, CA (United States). Materials Dept.
- Max-Planck-Inst. fuer Eisenforschung GmbH, Duesseldorf (Germany)
Impurity segregation at the Al{sub 2}O{sub 3}-metal interface of Fe-Cr-Al and Fe-Cr-Al-Y alloys oxidized at 1100 C was studied using Auger electron spectroscopy (AES). A strong sulfur segregation of the order of a monolayer was found at the contact oxide-metal interface on the yttrium-free alloy, while almost no sulfur was detected at the interface on the yttrium-containing alloy. These results are in agreement with the AES studies of surface segregation on the same alloys during heating at 900 C in ultra-high vacuum. It is suggested that stresses in the alumina scale and underlying metal during oxidation may provide the driving force for impurity segregation at the contact oxide-metal interface.
- OSTI ID:
- 364001
- Journal Information:
- Oxidation of Metals, Journal Name: Oxidation of Metals Journal Issue: 1-2 Vol. 52; ISSN OXMEAF; ISSN 0030-770X
- Country of Publication:
- United States
- Language:
- English
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