Title :
Effects of the Addition of Permalloy Powder on the High-Frequency Magnetic Properties of Fe-Based Amorphous Powder Cores
Author :
Kim, Yoon B. ; Kim, K.Y.
Author_Institution :
Adv. Metals Res. Center, Korea Adv. Inst. of Sci. & Technol., Seoul
Abstract :
FeSiB amorphous powder was produced by gas atomization, and subsequently toroidal-shaped FeSiB amorphous powder cores were prepared by cold pressing, using permalloy powder as an additive. The characteristics of gas-atomized FeSiB amorphous powder and high-frequency magnetic properties of the cores were investigated. FeSiB amorphous powder, exhibiting good soft magnetic properties with a saturation magnetization of 125 emu/g and a coercivity of 0.4 Oe, was successfully produced by gas atomization in the particle size range below 75 mum. The addition of permalloy powder was effective for compaction of FeSiB amorphous powder cores by cold pressing. Permalloy powder increases the effective permeability of the cores but deteriorates the high-frequency dependence of the permeability at high content
Keywords :
Permalloy; alloying additions; amorphous magnetic materials; boron alloys; ferromagnetic materials; iron alloys; magnetic permeability; particle size; powder cores; silicon alloys; soft magnetic materials; FeSiB; addition effect; amorphous powder cores; cold pressing; compaction; effective permeability; gas atomization; high-frequency magnetic properties; permalloy powder; saturation magnetization; soft magnetic properties; Additives; Amorphous materials; Coercive force; Compaction; Magnetic cores; Magnetic properties; Permeability; Powders; Pressing; Saturation magnetization; Cold pressing; FeSiB amorphous powder core; core loss; gas atomization; high-frequency characteristics;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.879884
