Vacuum hot pressing of Fe-Si-B-Nb-based amorphous powder cores and their high-frequency magnetic properties

E. Y. Kang; Yoon B. Kim; K. Y. Kim; Y. H. Chung; H. K. Baik

doi:10.1063/1.2172176

Vacuum hot pressing of Fe-Si-B-Nb-based amorphous powder cores and their high-frequency magnetic properties

E. Y. Kang, Yoon B. Kim, K. Y. Kim, Y. H. Chung, H. K. Baik

Department of Materials Science and Engineering

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

12 Citations (Scopus)

Abstract

FeSiBNb amorphous powder was prepared by gas atomization and subsequently consolidated into bulk amorphous cores by hot pressing after creating an oxide layer on the surface of the powder. FeSiBNb amorphous powders exhibiting a saturation magnetization of 127 emug and a coercivity of 0.34 Oe were successfully obtained by gas atomization. Hot pressing enabled consolidation of the FeSiBNb amorphous powder core within the supercooled liquid region. The core prepared from the FeSiBNb amorphous powder covered with an oxide layer of 1 μm thickness showed excellent high-frequency characteristics with a stable permeability over 10 MHz and a core loss of 400 mW cm3 at 50 kHz for Bm =0.1 T. The oxide layer formed on the FeSiBNb amorphous powder was effective in improving the frequency dependence of magnetic properties and in reducing the core loss for the FeSiBNb amorphous powder cores.

Original language	English
Article number	08F111
Journal	Journal of Applied Physics
Volume	99
Issue number	8
DOIs	https://doi.org/10.1063/1.2172176
Publication status	Published - 2006

Bibliographical note

Funding Information:
This research was supported by a grant from KIST of the Institutional R&D Program.

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1063/1.2172176

Cite this

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title = "Vacuum hot pressing of Fe-Si-B-Nb-based amorphous powder cores and their high-frequency magnetic properties",

abstract = "FeSiBNb amorphous powder was prepared by gas atomization and subsequently consolidated into bulk amorphous cores by hot pressing after creating an oxide layer on the surface of the powder. FeSiBNb amorphous powders exhibiting a saturation magnetization of 127 emug and a coercivity of 0.34 Oe were successfully obtained by gas atomization. Hot pressing enabled consolidation of the FeSiBNb amorphous powder core within the supercooled liquid region. The core prepared from the FeSiBNb amorphous powder covered with an oxide layer of 1 μm thickness showed excellent high-frequency characteristics with a stable permeability over 10 MHz and a core loss of 400 mW cm3 at 50 kHz for Bm =0.1 T. The oxide layer formed on the FeSiBNb amorphous powder was effective in improving the frequency dependence of magnetic properties and in reducing the core loss for the FeSiBNb amorphous powder cores.",

author = "Kang, {E. Y.} and Kim, {Yoon B.} and Kim, {K. Y.} and Chung, {Y. H.} and Baik, {H. K.}",

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AU - Kang, E. Y.

AU - Kim, Yoon B.

AU - Kim, K. Y.

AU - Chung, Y. H.

AU - Baik, H. K.

N1 - Funding Information: This research was supported by a grant from KIST of the Institutional R&D Program.

PY - 2006

Y1 - 2006

N2 - FeSiBNb amorphous powder was prepared by gas atomization and subsequently consolidated into bulk amorphous cores by hot pressing after creating an oxide layer on the surface of the powder. FeSiBNb amorphous powders exhibiting a saturation magnetization of 127 emug and a coercivity of 0.34 Oe were successfully obtained by gas atomization. Hot pressing enabled consolidation of the FeSiBNb amorphous powder core within the supercooled liquid region. The core prepared from the FeSiBNb amorphous powder covered with an oxide layer of 1 μm thickness showed excellent high-frequency characteristics with a stable permeability over 10 MHz and a core loss of 400 mW cm3 at 50 kHz for Bm =0.1 T. The oxide layer formed on the FeSiBNb amorphous powder was effective in improving the frequency dependence of magnetic properties and in reducing the core loss for the FeSiBNb amorphous powder cores.

AB - FeSiBNb amorphous powder was prepared by gas atomization and subsequently consolidated into bulk amorphous cores by hot pressing after creating an oxide layer on the surface of the powder. FeSiBNb amorphous powders exhibiting a saturation magnetization of 127 emug and a coercivity of 0.34 Oe were successfully obtained by gas atomization. Hot pressing enabled consolidation of the FeSiBNb amorphous powder core within the supercooled liquid region. The core prepared from the FeSiBNb amorphous powder covered with an oxide layer of 1 μm thickness showed excellent high-frequency characteristics with a stable permeability over 10 MHz and a core loss of 400 mW cm3 at 50 kHz for Bm =0.1 T. The oxide layer formed on the FeSiBNb amorphous powder was effective in improving the frequency dependence of magnetic properties and in reducing the core loss for the FeSiBNb amorphous powder cores.

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Vacuum hot pressing of Fe-Si-B-Nb-based amorphous powder cores and their high-frequency magnetic properties

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

Access to Document

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