Microstructure and soft magnetic properties of Fe85-xSi9.6Al5.4Tix composite magnetic powder cores

In this study, the effects of Ti content on the soft magnetic properties of Fe85-xSi9.6Al5.4Tix soft magnetic powder cores (SMPCs) were studied systematically. The addition of nonmagnetic Ti gradually decreased the saturation magnetization (M-s) of the Fe85-xSi9.6Al5.4Tix alloys powder, whereas the resistivity and density gradually increased, leading to a significant decrease in core loss (P-cv). The SMPCs doped with 0.5 wt% Ti showed the best magnetic properties, including low P-cv of 140.6 mW/cm(3), stable effective permeability (mu(e)) of 62.9 up to 1 MHz, and high DC bias performance of 46% at 100 Oe. Furthermore, the corrosion resistance of the Fe85-xSi9.6Al5.4Tix SMPCs gradually improved as the Ti content increased, reaching a maximum at a Ti content of 2.5 wt%, at which the corrosion current density decreased to a minimum of 1.45 x 10(-6) A/cm(2). The addition of Ti can effectively improve the corrosion resistance of Fe85Si9.6Al5.4 SMPCs. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

In this study, the effects of Ti content on the soft magnetic properties of Fe-Si-Al soft magnetic powder cores were systematically studied. It was found that the addition of Ti can effectively reduce core loss while improving resistivity and density. SMPCs doped with 0.5 wt% Ti exhibited the best magnetic properties and stable corrosion resistance.