Chromium and Nitrogen Segregation in Thin Oxide Layers Formed on the Surface of 17Cr-Ni-Mo-N Austenitic Steels Studied by Angle Resolved XPS
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概要
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Angle-resolved X-ray photoelectron spectroscopy (AR-XPS) has been used for characterizing thin oxide layers formed on the surface of 17Cr-Ni-Mo-N austenitic steels. It was confimed that chromium and nitrogen segregation takes place on the surface by <I>in-situ</I> heating at 973 K under ultra high vacuum. The effective thickness and concentration of their segregated layer was estimated from the relationship between the concentration and the take-off angle in AR-XPS. AR-XPS study was also made for specimens without and with segregated surface layers which were subsequently exposed to air at room temperature. The surface segregation of chromium and nitrogen was found to considerably inhibit oxidation at room temperature, and such feature was rather distinct compared with the ferritic steel case by chromium segragation alone. These results on the surface layers were consistent with changes in the observed chemical state denoted by Fe 2p and Cr 2p due to the surface segregation.
- 社団法人 日本鉄鋼協会の論文
- 1996-10-15
著者
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Waseda Yoshio
Institute For Advanced Materials Processing
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Suzuki Shigeru
Institute For Advanced Materials Processing Tohoku University
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Nakazawa Takanori
Technical Development Bureau Nippon Steel Corporation
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