ISSN:
1573-4889
Keywords:
ALUMINA SCALE
;
SEGREGATION
;
OXIDATION
;
SULFUR
;
OXIDE-METAL INTERFACE
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1018818906559
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