Novel Fe-based amorphous compound powder cores with enhanced DC bias performance by adding FeCo alloy powder

Abstract Novel amorphous magnetic-compound powder cores (AMPCs) composed of a mixture of water-atomized FeSiBPNbCr amorphous powder and FeCo alloy powder were successfully fabricated through cold pressing. FeCo alloy powder, which exhibits a high magnetic flux density (Bs) of 2.35 T, can improve the Bs and DC bias performance of the AMPCs. Compared to raw amorphous powder cores, the Bs and DC bias performance of AMPCs containing 30% FeCo alloy powder were improved by 35% and 24%, respectively. The core loss (Pcv) was maintained lower than 1000 mW/cm3, at a maximum magnetic induction of 0.1 T and frequency of 100 kHz. Novel AMPCs with high Bs, low Pcv, and good DC bias performance meet the needs of the new high-frequency large-current devices and have wide application prospects.