Microstructure of Nd2Fe17N3 Magnetic Powder Surface with Nano-α-Fe Phases Separated Surface Layer
We investigated the application of Nd 2 Fe 17 N 3 magnetic powder with planar magnetic anisotropy to magnetic field amplification materials at several tens of MHz. Consequently, we succeeded in developing a magnetic property with real permeability ~ 8 and imaginary permeability below 0.8 at 100 MHz...
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Published in | IEEE transactions on magnetics Vol. 59; no. 11; p. 1 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
New York
IEEE
01.11.2023
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
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Abstract | We investigated the application of Nd 2 Fe 17 N 3 magnetic powder with planar magnetic anisotropy to magnetic field amplification materials at several tens of MHz. Consequently, we succeeded in developing a magnetic property with real permeability ~ 8 and imaginary permeability below 0.8 at 100 MHz using a phosphoric acid coating and a simple heat treatment process in air. In this study, microstructural analysis conducted using transmission electron microscopy and X-ray diffraction revealed that the coating layer became thicker, and the Nd 2 Fe 17 N 3 surface was phase-separated into nano-sized α-Fe phases and Nd-rich phases, either oxide, oxynitride, or nitride. Additionally, the nano-sized α-Fe phases and the nano-sized Nd-rich phases were oriented over a wide area spanning several hundred nanometers. We concluded that these characteristic structures have led to improved properties. |
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AbstractList | We investigated the application of Nd 2 Fe 17 N 3 magnetic powder with planar magnetic anisotropy to magnetic field amplification materials at several tens of MHz. Consequently, we succeeded in developing a magnetic property with real permeability ~ 8 and imaginary permeability below 0.8 at 100 MHz using a phosphoric acid coating and a simple heat treatment process in air. In this study, microstructural analysis conducted using transmission electron microscopy and X-ray diffraction revealed that the coating layer became thicker, and the Nd 2 Fe 17 N 3 surface was phase-separated into nano-sized α-Fe phases and Nd-rich phases, either oxide, oxynitride, or nitride. Additionally, the nano-sized α-Fe phases and the nano-sized Nd-rich phases were oriented over a wide area spanning several hundred nanometers. We concluded that these characteristic structures have led to improved properties. We investigated the application of Nd2Fe17N3 magnetic powder with planar magnetic anisotropy to magnetic field amplification materials at several tens of megahertz. Consequently, we succeeded in developing a magnetic property with real permeability ~8 and imaginary permeability below 0.8 at 100 MHz using a phosphoric acid coating and a simple heat treatment process in the air. In this study, microstructural analysis conducted using transmission electron microscopy (TEM) and X-ray diffraction (XRD) revealed that the coating layer became thicker, and the Nd2Fe17N3 surface was phase-separated into nano-sized [Formula Omitted]-Fe phases and Nd-rich phases, either oxide, oxynitride, or nitride. In addition, the nano-sized [Formula Omitted]-Fe phases and the nano-sized Nd-rich phases were oriented over a wide area spanning several hundred nm. We concluded that these characteristic structures have led to improved properties. |
Author | Abe, Satoshi Imaoka, Nobuyoshi Akamatsu, Jun |
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SubjectTerms | Alpha iron Heat treatment Iron Magnetic anisotropy Magnetic permeability Magnetic properties Magnetism Microstructural analysis Microstructure Nd<sub xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">2 Fe<sub xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">17 N<sub xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">3 Permeability Phases Phosphoric acid Powders Surface layers Surface treatment Transmission electron microscopy X-ray scattering |
Title | Microstructure of Nd2Fe17N3 Magnetic Powder Surface with Nano-α-Fe Phases Separated Surface Layer |
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