Research on the surface oxidation procedure of Fe-base metallic glass during wet oxidation treatment

Eun Young Kang; Young Hoon Chung; Myoung Ryul Ok; Hong Koo Baik

doi:10.1016/j.msea.2006.02.311

Research on the surface oxidation procedure of Fe-base metallic glass during wet oxidation treatment

Eun Young Kang, Young Hoon Chung, Myoung Ryul Ok, Hong Koo Baik

Department of Materials Science and Engineering

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

10 Citations (Scopus)

Abstract

Internal structure of magnetic core for high-frequency use could be divided into small insulating units to minimize eddy current loss. Accordingly, the powder size of Fe_bal.Si_9.6B_14.4Nb₄ (numbers indicate at.%) amorphous alloy should be small and covered with some degree of insulating layer for producing high-frequency magnetic core. In this investigation, formation of the insulating layer on the surface of Fe-based amorphous alloy powder was studied using wet oxidation method. The size of Fe-Si-B-Nb amorphous alloy powder used in this research was less than 75 μm in diameter. Forming mechanism of surface cracks and consecutive oxide layers was explained and the thickness of insulating layer could be controlled by changing treatment time and concentration of HNO₃ in the oxidizing solution. Even though the oxide layer on the powder surface was partially flaked off during hot-compacting process, sufficient electrical resistance was maintained to lessen eddy current loss effectively.

Original language	English
Pages (from-to)	159-164
Number of pages	6
Journal	Materials Science and Engineering A
Volume	448-451
DOIs	https://doi.org/10.1016/j.msea.2006.02.311
Publication status	Published - 2007 Mar 25

Bibliographical note

Funding Information:
The research was supported by the Institutional R&D Program funded by Korea Institute of Science and Technology, Republic of Korea.

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.msea.2006.02.311

Cite this

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title = "Research on the surface oxidation procedure of Fe-base metallic glass during wet oxidation treatment",

abstract = "Internal structure of magnetic core for high-frequency use could be divided into small insulating units to minimize eddy current loss. Accordingly, the powder size of Febal.Si9.6B14.4Nb4 (numbers indicate at.%) amorphous alloy should be small and covered with some degree of insulating layer for producing high-frequency magnetic core. In this investigation, formation of the insulating layer on the surface of Fe-based amorphous alloy powder was studied using wet oxidation method. The size of Fe-Si-B-Nb amorphous alloy powder used in this research was less than 75 μm in diameter. Forming mechanism of surface cracks and consecutive oxide layers was explained and the thickness of insulating layer could be controlled by changing treatment time and concentration of HNO3 in the oxidizing solution. Even though the oxide layer on the powder surface was partially flaked off during hot-compacting process, sufficient electrical resistance was maintained to lessen eddy current loss effectively.",

author = "Kang, {Eun Young} and Chung, {Young Hoon} and Ok, {Myoung Ryul} and Baik, {Hong Koo}",

note = "Funding Information: The research was supported by the Institutional R&D Program funded by Korea Institute of Science and Technology, Republic of Korea. ",

year = "2007",

month = mar,

day = "25",

doi = "10.1016/j.msea.2006.02.311",

language = "English",

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journal = "Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing",

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T1 - Research on the surface oxidation procedure of Fe-base metallic glass during wet oxidation treatment

AU - Kang, Eun Young

AU - Chung, Young Hoon

AU - Ok, Myoung Ryul

AU - Baik, Hong Koo

N1 - Funding Information: The research was supported by the Institutional R&D Program funded by Korea Institute of Science and Technology, Republic of Korea.

PY - 2007/3/25

Y1 - 2007/3/25

N2 - Internal structure of magnetic core for high-frequency use could be divided into small insulating units to minimize eddy current loss. Accordingly, the powder size of Febal.Si9.6B14.4Nb4 (numbers indicate at.%) amorphous alloy should be small and covered with some degree of insulating layer for producing high-frequency magnetic core. In this investigation, formation of the insulating layer on the surface of Fe-based amorphous alloy powder was studied using wet oxidation method. The size of Fe-Si-B-Nb amorphous alloy powder used in this research was less than 75 μm in diameter. Forming mechanism of surface cracks and consecutive oxide layers was explained and the thickness of insulating layer could be controlled by changing treatment time and concentration of HNO3 in the oxidizing solution. Even though the oxide layer on the powder surface was partially flaked off during hot-compacting process, sufficient electrical resistance was maintained to lessen eddy current loss effectively.

AB - Internal structure of magnetic core for high-frequency use could be divided into small insulating units to minimize eddy current loss. Accordingly, the powder size of Febal.Si9.6B14.4Nb4 (numbers indicate at.%) amorphous alloy should be small and covered with some degree of insulating layer for producing high-frequency magnetic core. In this investigation, formation of the insulating layer on the surface of Fe-based amorphous alloy powder was studied using wet oxidation method. The size of Fe-Si-B-Nb amorphous alloy powder used in this research was less than 75 μm in diameter. Forming mechanism of surface cracks and consecutive oxide layers was explained and the thickness of insulating layer could be controlled by changing treatment time and concentration of HNO3 in the oxidizing solution. Even though the oxide layer on the powder surface was partially flaked off during hot-compacting process, sufficient electrical resistance was maintained to lessen eddy current loss effectively.

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SN - 0921-5093

VL - 448-451

SP - 159

EP - 164

JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

ER -

Research on the surface oxidation procedure of Fe-base metallic glass during wet oxidation treatment

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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