EXAFS studies on the fluctuation of solute in Al-1.9 at% Cu supersaturated solid solution

An EXAFS study is carried out for Al-1.9 at%Cu supersaturated solid solution. The experiment leads to an understanding of the feature of the first shell around copper atom in solid solution equivalent of pre-transitional alloy. The first shell is constituted of two radial components of 0.267 and 0.293 nm for Cu—Cu and Cu—Al pairs, respectively. The atomic ratio of copper atoms to aluminium atoms in the shell is nearly 3 to 9.