Improving the soft magnetic properties of binder jet printed iron-silicon alloy through boron addition

Geeta Kumari; Thang Q. Pham; Hawke Suen; Tanzilur Rahman; Patrick Kwon; Shanelle N. Foster; Carl J. Boehlert

doi:10.1016/j.matchemphys.2022.127181

Improving the soft magnetic properties of binder jet printed iron-silicon alloy through boron addition

Geeta Kumari, Thang Q. Pham, Hawke Suen, Tanzilur Rahman, Patrick Kwon, Shanelle N. Foster, Carl J. Boehlert

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

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 °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 °C exhibited the highest magnetic relative permeability (4447) and the lowest intrinsic coercivity (47.8 A/m).

Original language	English
Article number	127181
Journal	Materials Chemistry and Physics
Volume	296
DOIs	https://doi.org/10.1016/j.matchemphys.2022.127181
State	Published - Feb 15 2023
Externally published	Yes

Funding

The authors would like to thank the Department of Navy, Office of Naval Research for sponsoring this work, under ONR Award Number N00014-18-1-2514. The authors also would like to acknowledge Dr. Per Askeland from Michigan State University and Dr. Nicholas J. Jones from Naval Surface Warfare Centre for the experimental support. The authors would like to thank the Department of Navy, Office of Naval Research for sponsoring this work, under ONR Award Number N00014-18-1-2514 . The authors also would like to acknowledge Dr. Per Askeland from Michigan State University and Dr. Nicholas J. Jones from Naval Surface Warfare Centre for the experimental support.

Funders	Funder number
Department of Navy
Office of Naval Research	N00014-18-1-2514
Michigan State University
Naval Surface Warfare Center

Keywords

Additive manufacturing
Binder jet printing
Intrinsic coercivity
Iron-silicon-Boron alloy
Magnetic permeability
Soft magnetic materials

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.matchemphys.2022.127181

Cite this

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title = "Improving the soft magnetic properties of binder jet printed iron-silicon alloy through boron addition",

abstract = "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 °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 °C exhibited the highest magnetic relative permeability (4447) and the lowest intrinsic coercivity (47.8 A/m).",

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author = "Geeta Kumari and Pham, {Thang Q.} and Hawke Suen and Tanzilur Rahman and Patrick Kwon and Foster, {Shanelle N.} and Boehlert, {Carl J.}",

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AU - Kwon, Patrick

AU - Foster, Shanelle N.

AU - Boehlert, Carl J.

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N2 - 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 °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 °C exhibited the highest magnetic relative permeability (4447) and the lowest intrinsic coercivity (47.8 A/m).

AB - 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 °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 °C exhibited the highest magnetic relative permeability (4447) and the lowest intrinsic coercivity (47.8 A/m).

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KW - Iron-silicon-Boron alloy

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KW - Soft magnetic materials

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Improving the soft magnetic properties of binder jet printed iron-silicon alloy through boron addition

Abstract

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Keywords

UN SDGs

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