Abstract
Two iron-based metastable Fe–Cu alloys, one rich in iron, namely, Fe 72Cu 28 and the other rich in copper, namely, Cu 90Fe 10, in powder form are prepared using simultaneous electrodeposition of Fe and Cu from a common bath. Mössbauer spectroscopy and positron annihilation lifetime techniques are used to study the defects in these alloys. The samples present large concentrations of vacancy clusters made of at least 6 monovacancies. These seem to play a crucial role in stabilizing the alloy despite positive heat of formation.
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