Document Type
Book Chapter
Publication Date
1996
Journal or Book Title
Proceedings of the 5th International Conference on Quasicrystals
First Page
786
Last Page
789
Abstract
We have used Auger electron spectroscopy (AES), X-ray photoelectron spectroscopy (XPS) and low-energy electron diffraction (LEED) to characterize the surface properties of a single-grain Al70Pd21Mn9 (APM) quasicrystal (QC) upon oxidation. When oxygen is adsorbed on this surface, a disordered layer is formed at low coverages. This chemisorbed oxygen destroys the five-fold quasiperiodicity completely. Further adsorption of oxygen leads to a thin layer (less than 20 A) of AI oxide which passivates the surface. At elevated temperatures (870 K), adsorption of oxygen induces an enrichment of AI on the surface. This is explained by the exothermicity of its oxide and the possibility of increased mobility of AI at higher temperatures. Al is the only element in this QC which can be oxidized. No evidence of oxidization for Pd and Mn is observed.
Copyright Owner
World Scientific
Copyright Date
1996
Language
en
File Format
application/pdf
File Size
4 p.
Recommended Citation
Chang, S. -L.; Zhang, C. -M.; Jenks, Cynthia J.; Anderegg, James W.; and Thiel, Patricia A., "Surface Studies of Oxidation of a Single-Grain Quasicrystal" (1996). Ames Laboratory Publications. 145.
https://lib.dr.iastate.edu/ameslab_pubs/145
