Abstract
Present paper is mainly aimed at reporting on X-Ray Diffraction (XRD) and X-ray Absorption Spectroscopy (XAS) characterization of Fe/Cu metastable solid solution of different stoichiometries prepared by ball milling. Special attention is devoted to thermal stability and eventual short range ordering. The wide reciprocal solubility is confirmed with slight variation in the solubility gap which is related to the peculiar milling conditions. X-ray information and differential scanning calorimetry suggest an atomic level solubility. Near edge absorption measurements performed during heating process provide evidence of precursor segregation at grain boundaries for Fe80Cu20 composition. Such effect dominates over in-grain nucleation. Samples of lower Cu contents do not exhibit the same behavior.
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