We prepared Fe₈₀Si₈B₆Nb₅Cu amorphous-nanocrystalline strips with different phosphorus addition by the melt spinning method, and their nanocrystalline magnetic powder core was obtained after a series of processing. Then, the microstructure, micromorphology, thermal behavior, and magnetic properties were studied. The results show that the atomic radius difference (σ) affected the glass formation ability; thus, first, the grain size and coercivity decreased and then increased. The (Fe₈₀Si₈B₆Nb₅Cu)₉₉P nanocrystalline core has the better comprehensive magnetic properties than those of Fe₈₀Si₈B₆Nb₅Cu; its μ_e (75.93) is 5% higher, and P_cm (370 W/kg) is 14% lower than those of Fe₈₀Si₈B₆Nb₅Cu (i.e., 72.98 and 431.2 W/kg, respectively).

通过熔融纺丝法制备了磷添加量不同的Fe ₈₀ Si ₈ B ₆ Nb ₅ Cu非晶-纳米晶带，经一系列加工得到了纳米晶磁粉芯。然后，研究了组织，微观形貌，热行为和磁性能。结果表明，原子半径差（σ）影响玻璃的形成能力。因此，首先，晶粒尺寸和矫顽力减小，然后增大。（Fe ₈₀ Si ₈ B ₆ Nb ₅ Cu）₉₉P纳米晶核具有比Fe ₈₀ Si ₈ B ₆ Nb ₅ Cu更好的综合磁性能；其μ _È（75.93）是高5％，和P_厘米（370瓦/千克）比那些铁的低14％，₈₀的Si ₈乙₆的Nb ₅的Cu（即，72.98和431.2瓦/千克，分别地）。