Abstract
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 confirmed that chromium and nitrogen segregation takes place on the surface by in-situ 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 segregation alone. These results on the surface layers were consistent with changes in the observed chemical state denoted by Fe2p and Cr2p due to the surface segregation.
| Original language | English |
|---|---|
| Pages (from-to) | 1273-1278 |
| Number of pages | 6 |
| Journal | Isij International |
| Volume | 36 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 1996 |
Keywords
- Angle-resolved X-ray photoelectron spectroscopy
- Austenitic steel
- Initial oxidation
- Stainless steel
- Surface segregation
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry