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

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 (B-s) of 2.35 T, can improve the B-s and DC bias performance of the AMPCs. Compared to raw amorphous powder cores, the B-s and DC bias performance of AMPCs containing 30% FeCo alloy powder were improved by 35% and 24%, respectively. The core loss (P-cv) was maintained lower than 1000 mW/cm(3), at a maximum magnetic induction of 0.1 T and frequency of 100 kHz. Novel AMPCs with high B-s, low P-cv, and good DC bias performance meet the needs of the new high-frequency large-current devices and have wide application prospects.