Research on Preparation and Properties of Fe-Si-Al Soft Magnetic Composites

Abstract:

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The Fe-Si-Al soft magnetic composites were produced by cold pressing of water-atomized Fe-Si-Al powder using organic binder. The effect of shaping pressure, annealing temperature, magnetic annealing and dielectric content on properties of Fe-Si-Al soft magnetic composites was investigated. The results showed that increasing shaping pressure increases density and radial crushing strength of Fe-Si-Al soft magnetic cores, and decreases coercivity and total loss. Increasing annealing temperature can increase effective permeability and decrease total loss owing to decreasing hysteresis loss, and over-annealing (>660°C) can deteriorate magnetic properties. The magnetic annealing can decrease total loss of Fe-Si-Al magnetic powder core. Increasing dielectric content can reduce the eddy current loss of Fe-Si-Al magnetic powder core and decrease the real part of permeability. Fe-Si-Al magnetic powder core with shaping pressure of 1800 MPa, annealing temperature of 660 °C and dielelctric content of 0.7% presented the optimum magnetic properties with an effective permeability of 127, a total loss of 78mW/cm3 and a radial crushing strength of 18MPa.

Info:

Periodical:

Edited by:

Tianbiao Zhang and Jerry Tian

Pages:

173-178

DOI:

10.4028/www.scientific.net/AMR.298.173

Citation:

Q. D. Li et al., "Research on Preparation and Properties of Fe-Si-Al Soft Magnetic Composites", Advanced Materials Research, Vol. 298, pp. 173-178, 2011

Online since:

July 2011

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$35.00

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