| 【文章摘要】 FePBNbCr amorphous soft magnetic composites (SMCs) with high compaction density (ρ_c) and commendable magnetic properties were successfully fabricated via low-pressure hot-compacting at 160 MPa. Due to the thermoplastic properties of amorphous powders in supercooled liquid region (ΔT_x), the hot-compacting in the ΔT_x is conducive to the increase of ρ_c for the amorphous SMCs, thereby improving the corresponding soft magnetic properties via reducing the number of pinning sites. Compared with these of the cold-compacted amorphous SMCs at 600 MPa, the ρ_c increases by 20.3 % to 6.04 g/cm~3, the effective permeability increases by 5.26 times to 95.3, while the corresponding total core loss decreases 74.5 % to 154.4 kW/m~3 (100 kHz, 0.05 T) for the amorphous SMCs hot-compacted at 495 ℃ with a pressure holding time of 6 min. These results indicate that the low-pressure hot compacting is an effective measure to further improve soft magnetic properties of the amorphous SMCs for rapidly adapting to the development needs of high-frequency and miniaturization of electronic devices. |