期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 296, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2022.127181
关键词
Additive manufacturing; Binder jet printing; Soft magnetic materials; Iron-silicon-Boron alloy; Magnetic permeability; Intrinsic coercivity
This study investigates the microstructure and magnetic properties of Fe-Si-B alloys with different Si and B contents. It is found that the Fe-5wt.%Si alloy with 0.25% B sintered at 1200 degrees C exhibits the highest magnetic relative permeability (4447) and the lowest intrinsic coercivity (47.8 A/m).
Fe-Si alloys are an essential class of soft magnetic materials due to their high magnetic permeability and low hysteresis loss. Increasing the Si content above 3 wt% promotes coarser grain sizes and greater electrical resistivity, thereby enhancing the magnetic properties, such as magnetic permeability and specific loss density. However, the increased silicon content makes the machining challenging. Additive manufacturing technologies enable production of near net shape Fe-Si alloys with high silicon content, practically eliminating the machining challenges. This work investigated the effects of Si content, which ranged from 3 to 5 wt%, and B content, which ranged from 0 to 0.25 wt%, on the microstructure and magnetic properties. The Fe-Si-B alloys were binder jet printed, where the sintering temperature was varied between 1200 and 1250 degrees C, and microstructure-magnetic property relationships were investigated by characterizing the magnetic permeability, intrinsic coercivity, grain size, and density. The Fe-5wt.%Si alloy with 0.25% B sintered at 1200 degrees C exhibited the highest magnetic relative permeability (4447) and the lowest intrinsic coercivity (47.8 A/m).
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