Enhancing the high-frequency performance of FeSiAl/WS2 composites with small particle sizes

This study utilized FeSiAl with 200- and 600-mesh sizes as the raw material and a layered 2D semiconducting material (WS 2 ) as an insulation coating agent. FeSiAl/2.25 wt%WS 2 composites were developed through ultrasonic mixing, and the influence of the particle size on their morphology and magnetic properties was systematically investigated. Results obtained from scanning electron microscopy revealed a uniform coating of the 2D layered WS 2 on the surface of the FeSiAl particles, thus forming an efficient inorganic coating layer. Composite permeability experiments indicated that reducing the FeSiAl particle size not only enhanced the relaxation frequency( f r ) of the FeSiAl/2.25 wt%WS 2 composites but also lowered the eddy current losses, making these composites highly suitable for high-frequency operation and applications. Sample B exhibited lower magnetic loss than Sample A, with a magnetic loss equal to 367 kW/m 3 at 1 MHz and 20 mT.