Improved magnetic properties of FeSiCr amorphous soft magnetic composites by adding carbonyl iron powder

• Published in: Journal of non-crystalline solids 2021-05, Vol.559, p.120673, Article 120673
• Main Authors: Xia, Chao, Peng, Yuandong, Yi, Xuwu, Yao, Zhixin, Zhu, Yuanyuan, Hu, Geng
• Format: Article
• Language: English
• Subjects: Amorphous FeSiCr; Carbonyl iron powder; Magnetic properties; Soft magnetic composites
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/j.jnoncrysol.2021.120673

•Addition of CIP improve the compressibility and densities of FeSiCr amorphous SMCs.•With CIP content increase, SMCs densities are increase and increase rate decrease.•Magnetic properties of amorphous SMCs can be controlled by adjusting the CIP content.•With the content of CIP 30 wt.%, the magnetic loss of amorphous SMCs is the smallest. FeSiCr mixed soft magnetic composites (SMCs) were prepared by adding different content of carbonyl iron powder (CIP) with average particle size of 4.75 μm to amorphous FeSiCr powder with that of 16.7 μm. The effects of the additional amount of CIP on the microstructure, densities and magnetic properties of FeSiCr amorphous SMCs were investigated. When the content of CIP was increased from 0 wt.% to 50 wt.%, the relative density increased from 75.9% to 84.9%, and the magnetic permeability of sample heat treated at 500 °C increased from 19.1 to 36.8 and increased by 92.7%. With the increase of the amount of CIP, the increase rate of density for SMCs gradually decrease, and can be divided into three distinct grades. When the content of CIP is 30 wt.%, the magnetic loss of FeSiCr SMC treated at 500 °C is the smallest (342.91 mW/cm3@1000 kHz, 20 mT).