Improvement of soft magnetic properties of FeSiBPNb amorphous powder cores by addition of FeSi powder

The effect of FeSi powder with volume fraction of 0–40% on the soft magnetic properties of the FeSiBPNb amorphous powder cores has been systematically investigated in this study. The results shows that the amorphous magnetic powder core mixed with 10% FeSi powders in volume fraction exhibits superior DC-bias properties, constant permeability, low core loss up to a higher frequency range, and excellent soft magnetic properties after appropriate heating treatment. The DC-bias properties of the present amorphous magnetic cores decrease by only 20% as the external field increases to 100 Oe. Meanwhile, it also exhibits a high permeability of 60 at 10 MHz and a low core loss of 159 W/kg at Bm = 0.1 T and f = 50 kHz. The present Fe-based amorphous magnetic powder cores mixed FeSi powders with superior DC-bias properties are a potential candidate for a variety of industrial applications. •Amorphous FeSiBPNb/FeSi compound powder cores were successfully prepared.•The powder cores mixed with 10% FeSi powders show the best magnetic properties.•The compound powder cores exhibit superior DC-bias properties and low core loss.