TY - JOUR
T1 - Chemical coating of crystalline-Fe/amorphous-Fe core-shell structured composites and their enhanced soft magnetic properties
AU - Wu, Yue
AU - Meng, Bingyang
AU - Yang, Bai
AU - Zhou, Bohui
AU - Ren, Chaolong
AU - Yu, Ronghai
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/1/15
Y1 - 2020/1/15
N2 - New-type crystalline-Fe/amorphous-Fe core-shell structures with greatly-improved soft magnetic performance have been synthesized from coating micron-sized Fe powders with amorphous micrometer-thick Fe layers using a facile chemical coating method. Surface-oxidized amorphous Fe layers are uniformly coated upon the surfaces of high-purity Fe particles, which results in their high saturated magnetization (204.6 A m2 kg−1) and high compacted density (7.42 g/cm3) in these crystalline-Fe/amorphous-Fe composites. For metal-based soft magnetic composites used in high-power applications, it is always an important goal to accomplish increased magnetic inductions along with reduced core loss. In the present work, excellent soft magnetic performance containing high inductions, reduced core loss and desirable frequency-dependent magnetic characteristics is successfully achieved in fully compressed crystalline-Fe/amorphous-Fe composites due to higher resistivity of amorphous Fe shells, which promises their latent utilization for high-power metal-based magnetic devices.
AB - New-type crystalline-Fe/amorphous-Fe core-shell structures with greatly-improved soft magnetic performance have been synthesized from coating micron-sized Fe powders with amorphous micrometer-thick Fe layers using a facile chemical coating method. Surface-oxidized amorphous Fe layers are uniformly coated upon the surfaces of high-purity Fe particles, which results in their high saturated magnetization (204.6 A m2 kg−1) and high compacted density (7.42 g/cm3) in these crystalline-Fe/amorphous-Fe composites. For metal-based soft magnetic composites used in high-power applications, it is always an important goal to accomplish increased magnetic inductions along with reduced core loss. In the present work, excellent soft magnetic performance containing high inductions, reduced core loss and desirable frequency-dependent magnetic characteristics is successfully achieved in fully compressed crystalline-Fe/amorphous-Fe composites due to higher resistivity of amorphous Fe shells, which promises their latent utilization for high-power metal-based magnetic devices.
KW - Chemical coating
KW - Crystalline-Fe/amorphous-Fe core-shell composites
KW - High compacted density
KW - High magnetic inductions
KW - High saturated magnetization
KW - Reduced core loss
UR - https://www.scopus.com/pages/publications/85071730931
U2 - 10.1016/j.jmmm.2019.165774
DO - 10.1016/j.jmmm.2019.165774
M3 - 文章
AN - SCOPUS:85071730931
SN - 0304-8853
VL - 494
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
M1 - 165774
ER -