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Effect of Binders on the Magnetic Behavior of P/M Processed FeSiBCuNb Alloy

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Abstract:

The effect of heat treatment and binder additions on the magnetic behavior of P/M(powder metallurgy) processed Fe73.5Si13.5B9Cu1Nb3 alloy has been investigated. FeSiBCuNb amorphous ribbons produced by plannar flow casting were annealed at temperatures between 480°C and 620°C for 20 to 60 minutes. The annealed specimens were milled using a pin crusher and a hammer mill. The powder was then mixed with mineral or polymer binders to press into a toroidal shape of inductor core at room temperature. Fe73.5Si13.5B9Cu1Nb3 alloy showed maximum permeability when annealed at 540°C for 40 minutes. The microstructure of the annealed ribbon has a ultra-fine α-Fe(Si) grain, ranging from 10 to 20 nm in diameter. Inductor cores produced using a glass binder showed better magnetic properties than polymers or oxide binders. The use of mineral binders in producing nanocrystalline inductor cores significantly improved magnetic properties, compared to a commercial moly-permalloy powder core.

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Periodical:

Materials Science Forum (Volumes 449-452)

Pages:

501-504

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.449-452.501

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Online since:

March 2004

Authors:

Hee Jin Kim, Yong Sul Song, Won Wook Park, Keun Yong Sohn

Keywords:

FeSiBCuNb, Insulation, Nanocrystalline, Powder Core, Soft Magnetic

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© 2004 Trans Tech Publications Ltd. All Rights Reserved

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