Abstract
Fe83.2-xCoxP10C6Cu0.8 (x = 0, 4, 6, 8 and 10) alloys with a high amorphous-forming ability and good soft-magnetic properties were successfully synthesized. Saturation magnetic flux density (Bs) is effectively enhanced from 1.53 T to 1.61 T for as-quenched alloy by minor Co addition, which is consistent well with the result of the linear relationship between average magnetic moment and magnetic valence. For Co-contained alloys, the value of corecivity (Hc) is mainly determined by magneto-crystalline anisotropy, while effective permeability (μe) is dominated by grain size and average saturation polarization. After proper heat treatment, the Fe79.2Co4P10C6Cu0.8 nanocrystalline alloy exhibited excellent soft-magnetic properties including a high Bs of 1.8 T, a low Hc of 6.6 A/m and a high μe of 15,510, which is closely related to the high volume fraction of α-(Fe, Co) grains and refined uniform nanocrystalline microstructure.
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