Abstract
Fe4N/Fe soft magnetic composites (SMCs) are fabricated by gas nitridation and molding compaction. The magnetic properties of Fe4N/Fe SMCs have been investigated. With increasing nitridation time, the content of the Fe4N phase, coercivity HC and remanent magnetization Mr increase, while saturation magnetization MS decreases. The core loss of Fe4N/Fe SMCs, especially eddy-current loss, is obviously improved with the increase of Fe4N content. The SMCs with higher Fe4N content present lower μ′, μ″, loss tangent and higher μQ product. Moreover, DC-bias performance has also been improved effectively after nitridation. The results suggest nitridation can effectively improve soft magnetic properties at high frequency.
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