Effects of sintering temperature on Fe-based soft magnetic composite prepared by spark plasma sintering
1. School of Materials Science and Engineering, Tongji University, Shanghai 201804, China; 2. Shanghai Key Laboratory for R & D and Application of Metallic Functional Materials, Shanghai 201804, China
Abstract：Fe powders coated with 10％ MnZnFe2O4 were fabricated by dry-type ball milling. The resultant composite powders were consolidated to magnetic powder cores by spark plasma sintering (SPS). The effects of sintering temperature on microstructure, density and magnetic properties were investigated. The microstructure and the magnetic properties of Fe／MnZnFe2O4 powder cores at different sintering temperatures were investigated by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and B-H analyzer. The experimental results show that Fe／MnZnFe2O4 powder core sintered at 700 ℃ for 5 min exhibits excellent soft magnetic properties. Core losses are decreased to nearly 1／10 of those of Fe powder core due to the insulation effect of MnZnFe2O4 particles, which significantly expands the applicable frequency range.
2018, Vol. 39 
