The Influence of the Silicon Content on the Formation of Fe23B6 Metastable Phases in Fe65Co11−xB20SixZr2Hf2 Bulk Amorphous Alloys

This study aims to determine the effect of addition of a small quantity of Si on the formation of nanocrystalline structure in rapidly cooled Fe-Co-B alloys. As part of the work, the following alloys were produced using a method involving the forcing of each respective liquid alloy into a copper mold: Fe65Co11−xB20SixZr2Hf2 (where: x = 0; 0.25; 0.5; 0.75; 1). Analysis of recorded X-ray diffraction patterns confirmed that a nanocrystalline structure was obtained in the alloys. The intensity of the diffraction reflections was found to change with changing Si content. The Fe23B6 crystalline phase was present in the volume of each alloy. This phase has soft magnetic properties. The presence of the Fe23B6 phase was confirmed by measurements of the magnetic polarization of saturation as a function of temperature.