The microstructure and magnetic properties of the Fe-Cu-Nb-Si-B finemets with different copper content

The microrelief of three metal alloys with different copper contents was studied. It is shown, that samples with a small copper content are X-ray amorphous. The alloy with the addition of 1.5% copper characterizes by an amorphous-crystalline structure. The change in magnetic characteristics of alloys as a function of composition was studied during the thermomagnetic annealing process.