Structural and Magnetic Properties of Mechanically Alloyed Fe50Co50 Systems

Abstract

The nanostructured Fe–Co alloys were prepared by mechanical alloying of elemental powders using a high-energy ball mill. This made it possible to study the structural evolution of the milling product with the grinding time. In addition to previous X-ray diffraction and thermomagnetic investigations, 57Fe based Mössbauer transmission spectroscopy was used for this purpose. Iron was alloyed with cobalt just after one hour of milling and bcc Fe–Co solid solution was formed. The analysis of the hyperfine magnetic field distribution proved that no significant structural changes occurred during further milling. A slight but regular increase in the standard deviation was observed, indicating an enhancement of topological disorder or/and an increase in internal stresses.