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

Journal Article · Sat Apr 15 00:00:00 EDT 2006 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.2172176· OSTI ID:20788126

Kang, E Y; Kim, Yoon B; Kim, K Y; Chung, Y H; Baik, H K ^[1]

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1. Advanced Metals Research Center, Korea Institute of Science and Technology, Seoul 136-791 (Korea, Republic of)

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 emu/g 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 {mu}m thickness showed excellent high-frequency characteristics with a stable permeability over 10 MHz and a core loss of 400 mW/cm{sup 3} at 50 kHz for B{sub m}=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.

• OSTI ID: 20788126
• Journal Information: Journal of Applied Physics, Vol. 99, Issue 8; Other Information: DOI: 10.1063/1.2172176; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ATOMIZATION
BORON ALLOYS
COERCIVE FORCE
DISSOCIATION
FREQUENCY DEPENDENCE
HOT PRESSING
IRON ALLOYS
KHZ RANGE 01-100
MAGNETIC MATERIALS
MAGNETIC PROPERTIES
MAGNETIZATION
MHZ RANGE 01-100
NIOBIUM ALLOYS
OXIDES
PARTICLES
PERMEABILITY
POWDERS
SILICON ALLOYS
THICKNESS