Structural-phase states and properties of medium-entropy amorphous soft magnetic ribbons of the Fe-Co-Si-B-P alloy system

An analysis of the structural-phase states, mechanical, and magnetic properties of amorphous alloys (Fe,Co)BSi and (Fe,Co)BSiP, produced by melt spinning, has been conducted. The distribution of elemental composition was traced, revealing phase separation in silicon and cobalt. It was demonstrated that the experimentally determined saturation induction values (1.7–1.8 T) and coercivity (18–20 A/m) exhibit virtually no dependence on variations in ribbon composition within the studied elemental range. The ultimate tensile strength (~162 MPa) and elongation at break (~0.23%) indicate low ductility in the examined ribbons. However, the elastic modulus was notably high, reaching 81.5 MPa.