Abstract
The chemical differences between passivated and oxidized layers on 17.5 at.% FeCr and 5 at.% FeTi alloys are analysed by means of soft x-ray absorption spectroscopy (XAS). The relative absorption strengths were used to obtain a quantitative estimation of the composition of the layers. In FeCr, the passivated layer shows a relative Cr enrichment of 34 at.% with respect to the oxidized surface. In addition, Cr2O3 has been identified as the main oxide formed in the passivated layer of FeCr. By contrast, in FeTi, the results are consistent with the formation of a ternary oxide. The potential of XAS in the study of oxidation and passivation is discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 21-26 |
| Number of pages | 6 |
| Journal | Surface and Interface Analysis |
| Volume | 20 |
| Issue number | 1 |
| Publication status | Published - Jan 1993 |
| Externally published | Yes |
Keywords
- MOLECULAR-ORBITAL STRUCTURE
- IRON-CHROMIUM ALLOYS
- ELECTRONIC-STRUCTURE
- COMPOSITION PROFILE
- BAND SPECTRA
- FILMS
- TRANSITION
- OXYGEN
- ESCA
- DISSOLUTION