Structural study of an amorphous Cu64Ti36 alloy produced by mechanical alloying using XRD, EXAFS and RMC simulations

The structure of an amorphous Cu64Ti36 alloy produced by mechanical alloying was studied by X-ray diffraction (XRD) and extended X-ray absorption fine structure (EXAFS) spectroscopy techniques and modeled through reverse Monte Carlo simulations using the total structure factor S(K)S(K) and the EXAFS χ(k)χ(k) oscillations on Cu K edge as input data. From the simulations the partial pair distribution functions gij(r)gij(r) and the bond-angle distribution functions Θijℓ(cosθ) were determined and, from these functions, average coordination numbers and average interatomic distances for the first neighbors were calculated. We also obtained information about the three-dimensional structures present in the alloy.