Microstructure and soft-magnetic properties of FeCoPCCu nanocrystalline alloys

• DOI: 10.1016/j.jmst.2019.03.030
• Publication Date: 2019-03-15T13:39:05Z
• Authors: Long Hou; Xingdu Fan; Qianqian Wang; Weiming Yang; Baolong Shen
• Keywords: Nanocrystalline material; Volume fraction; Magnetic alloy; Saturation (graph theory)

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.