Abstract
Herein, flake-like FeSiAl particles are prepared by rapid quenching and subsequent ball milling processes. Then, soft magnetic composites are fabricated by orderly aligned flake-like FeSiAl particles, resulting in the formation of nacre-like structure. The influence of processing parameters on columnar microstructure of the thin strips has been studied in detail. Furthermore, the magnetic permeability and loss of the soft magnetic composites, with different compositions, are explored. The results reveal that the soft magnetic composite, with flake-like Fe85Si9.6Al5.4, renders the magnetic permeability of 200 at 1 MHz, which is much higher than the spherical FeSiAl particles. Moreover, the negative temperature-dependent loss and a valley temperature of 65 °C are observed at the Sendust composition of Fe85Si8.8Al6.2, which maintained the magnetic permeability of 172 at 1 MHz and a loss of 380 kW/m3 at 50 kHz (stimulated at 100 mT). It is worth emphasizing that the nacre-like SMC exhibits outstanding properties and renders promise for next-generation magnetic devices.
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