Abstract
The aim of the present paper is to investigate the local atomic arrangement of an Al{sub 5}Ti{sub 2}Cu alloy, in order to determine if it is consistent with a cubic or tetragonal symmetry. From this point of view, the Extended X-ray Absorption Fine Structure (EXAFS) seems the most suited method, as it allows one to determine the local chemical environment of atoms. The analysis of the local order in the Al{sub 5}Ti{sub 2}Cu alloy is consistent with a random distribution f copper on the Al sites rather than with a preferential ordering on these sites. This means that the structure of this alloy should exhibit a cubic symmetry. However, the EXAFS signals do contain a very large amount of structural information. In the future, it would be interesting to extend the k range analysis, principally at the Cu-K edge by acquiring the data at liquid nitrogen temperature and to include multiple scattering effects in the analysis of the spectra at the Ti-K edge.
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