首页|High-strength and corrosion-resistant Fe/Al2SiO5 soft magnetic composites fabricated by a nanoscale solid-reaction coating method
High-strength and corrosion-resistant Fe/Al2SiO5 soft magnetic composites fabricated by a nanoscale solid-reaction coating method
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NSTL
Elsevier
Low mechanical performance is the key technical problem for metal-based soft magnetic composites (SMCs) with core-shell structures needed to be urgently resolved for their actual applications due to the limitation of their conventional preparation methods. In this work, dense sintered Al2SiO5 ceramic layers have been in situ formed and entirely coated on the surfaces of high-purity deformed Fe particles via a low temperature solid-phase reaction between initially-coated amorphous nano-Al2O3 and nano-SiO2 to obtain a new ceramic-reinforced Fe/Al2SiO5 SMCs. The fully-densified Fe/Al2SiO5 SMCs exhibit a high transverse rupture strength value of 120 MPa, which exceeds those for most of present metal-based SMCs. These ceramic-coated Fe-based composites also show strong corrosion resistance in water-air and salt-water conditions due to the anti-corrosion Al2SiO5 coating layers completely isolating the deformed Fe particles from the corrosion environments. Good magnetic performance is maintained in these high-strength and corrosion-resistant Fe/Al2SiO5 SMCs due to the suitable thickness of Al2SiO5 coating layers, which promises their broad application prospects for high-power electromagnetic devices in critical environments. Moreover, the fabrication for fully-densified functional metal-ceramic composites by a nanoscale solid-state reaction coating method in this work can provide a new insight for the research and applications of the other new-type metal-based composites. (c) 2022 Elsevier B.V. All rights reserved.
NSTL
Elsevier
