Auger electron spectroscopic study of CO2 adsorption on Zircaloy-4 surfaces

We investigate the adsorption of CO2 onto Zircaloy-4 (Zry-4) surfaces at 150, 300 and 600K using Auger electron spectroscopy (AES). Following CO2 adsorption at 150K the graphitic form of carbon is detected, whereas upon chemisorption at 300 and 600K we detect the carbidic phase. As the adsorption te...

Full description

Saved in:
Bibliographic Details
Published inApplied surface science Vol. 254; no. 9; pp. 2866 - 2870
Main Authors STOJILOVIC, N, FARKAS, N, RAMSIER, R. D
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier Science 28.02.2008
Subjects
Online AccessGet full text

Cover

Loading…
More Information
Summary:We investigate the adsorption of CO2 onto Zircaloy-4 (Zry-4) surfaces at 150, 300 and 600K using Auger electron spectroscopy (AES). Following CO2 adsorption at 150K the graphitic form of carbon is detected, whereas upon chemisorption at 300 and 600K we detect the carbidic phase. As the adsorption temperature is increased, the carbon Auger signal increases, whereas the oxygen signal decreases. Adsorption at all three temperatures results in a shift of the Zr Auger features, indicating surface oxidation. The effect of adsorbed CO2 on the Zr(MVV) and Zr(MNV) transitions depends on adsorption temperature and is less pronounced at higher temperatures. On the other hand, changes in the Zr(MNN) feature are similar for all three adsorption temperatures. The changes in the Zr Auger peak shapes and positions are attributed to oxygen from dissociated CO2, with the differences observed at various temperatures indicative of the diffusion of oxygen into the subsurface region.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2007.10.028