Development of high-performance Fe-rich Fe–P–C amorphous alloys with enhanced magnetization and low coercivity

Using melt spinning technology, we successfully synthesized a series of Fe-rich Fe–P–C amorphous alloys exhibiting high saturation magnetization (B_s), low coercivity (H_c), and excellent bending ductility. These alloys exhibit low H_c values ranging from 4.1 to 7.2 A/m, and high B_s values ranging from 1.58 to 1.68 ​T. Particularly, after annealing at 588 ​K for 900 ​s, the Fe₈₃P₁₁C₆ amorphous alloy showed extraordinary soft magnetic properties: B_s up to 1.68 ​T, H_c only 4.7 A/m, and the core loss at approximately 1.5 ​W/kg under the condition of 0.5 ​T and 50 ​Hz, all of which surpass the reported Fe–P–C ternary amorphous and nanocrystalline alloys. These Fe-rich Fe–P–C alloy ribbon samples exhibit favorable bending ductility in both the as-spun and annealed states. Their simple alloy composition, outstanding soft magnetic properties, and excellent flexibility collectively make these soft magnetic alloys highly promising candidate materials for industrial applications.