Study on the Optimization of Fe Content of FeSiBC Amorphous Powders

In this paper, four types of amorphous spherical powders with different Fe contents were produced by a novel gas–water combined atomization process, and the corresponding magnetic powders coresMagnetic powders core (MPCs) were fabricated. It was found that as Fe contentFe content was increased from 92.66 to 94.55 wt%, both the D50 and enthalpy of crystallization of the powders decreased and then increased, while the coercivity increased and then decreased together with a linearly enhanced saturation magnetizationSaturation magnetization. Among them, Fe94.55Si1.05B4.3C0.1 amorphous powdersAmorphous powders have smaller particle size (D50 = 31.67 μm), excellent circularity (0.95), good thermal stability (∆T = 46 K), and highest saturation magnetization (172 emu g−1), thus showing the most excellent overall properties. The core loss and the permeability of the corresponding MPCs for the Fe94.55Si1.05B4.3C0.1 amorphous powders are 79.76 kW m−3 (0.02 T, 100 kHz) and 25.95, respectively, which shows the possibility to develop amorphous powdersAmorphous powders and MPCsMagnetic powders core with high Fe contentFe content through the present gas–water combined atomization.