Fabrication and high-frequency performance manipulation for CeFeCo rare-earth soft magnetic composites
Ce2(Fe0.8Co0.2)17 as a rare-earth soft magnetic alloy was focused on,and the regulatory mechanisms of ball-milling and surface oxidation on the microstructure,soft magnetic properties,and high-frequency loss of corre-sponding composites were elucidated.The rare-earth soft magnetic composites exhibit exceptional frequency stability within the megahertz range.Flakey magnetic powders obtained via ball milling are beneficial to introduce size and shape effects to effectively suppress high-frequency ferromagnetic resonance,enhance the cutoff frequency,and mit-igate eddy current effects.Surface oxidation of the flaky powders further disrupts eddy current pathways between the magnetic particles,significantly reducing high-frequency eddy current loss.The optimized magnetic core demon-strates a low power loss of 1 363.1 kW/m3 at 3 MHz and 10 mT,laying foundation for the development of high-fre-quency and low-loss soft magnetic composites.
rare-earth soft magneticcomposite materialball-millinginsulation coatingpower loss
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