Segregation at the Al2O3-FeCrAl interface during high-temperature oxidation

被引：32

作者：

Tolpygo, VK ^{[1
]}

Viefhaus, H

机构：

[1] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

[2] Max Planck Inst Eisenforsch GmbH, D-40237 Dusseldorf, Germany

来源：

OXIDATION OF METALS | 1999年 / 52卷 / 1-2期

关键词：

alumina scale; segregation; oxidation; sulfur; oxide-metal interface;

D O I：

10.1023/A:1018818906559

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Impurity segregation at the Al2O3-metal interface of Fe-Cr-Al and Fe-CrAl-Y alloys oxidized at 1100 degrees 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 degrees 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.

引用

页码：1 / 29

页数：29

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