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Digitale Medien

Segregation at the Al2O3-FeCrAl Interface During High-Temperature Oxidation (1999)

Tolpygo, V. K. ; Viefhaus, H.

Springer

Oxidation of metals 52 (1999), S. 1-29

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Details

ISSN: 1573-4889

Schlagwort(e): ALUMINA SCALE ; SEGREGATION ; OXIDATION ; SULFUR ; OXIDE-METAL INTERFACE

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau

Notizen: Abstract Impurity segregation at theAl2O3-metal interface of Fe-Cr-Aland Fe-Cr-Al-Y alloys oxidized at 1100°C was studiedusing Auger electron spectroscopy (AES). A strong sulfursegregation of the order of a monolayer was found at the contactoxide-metal interface on the yttrium-free alloy, whilealmost no sulfur was detected at the interface on theyttrium-containing alloy. These results are in agreement with the AES studies of surface segregation onthe same alloys during heating at 900°C inultra-high vacuum. It is suggested that stresses in thealumina scale and underlying metal during oxidation may provide the driving force for impuritysegregation at the contact oxide-metalinterface.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1018818906559

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