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Synthesis and characterization of soft magnetic composite in Fe2O3-Mg system by mechanical alloying
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 Title & Authors
Synthesis and characterization of soft magnetic composite in Fe2O3-Mg system by mechanical alloying
Lee, Chung-Hyo;
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 Abstract
We have applied mechanical alloying (MA) to produce soft magnetic composite material using a mixture of elemental -Mg powders. An optimal milling and heat treatment conditions to obtain soft magnetic -Fe/MgO composite with fine microstructure were investigated by X-ray diffraction, differential scanning calorimetry (DSC) and vibrating sample magnetometer (VSM) measurement. It is found that -Fe/MgO composite powders in which MgO is dispersed in -Fe matrix are obtained by MA of with Mg for 30 min. The saturation magnetization of ball-milled powders increases with increasing milling time and reaches to a maximum value of 69.5 emu/g after 5 h MA. The magnetic hardening due to the reduction of the -Fe grain size by MA was also observed. Densification of the MA powders was performed in a spark plasma sintering (SPS) machine at under 60 MPa. X-ray diffraction result shows that the average grain size of -Fe in -Fe/MgO nanocomposite sintered at is in the range of 110 nm.
 Keywords
Soft magnetic powder;Mechanical alloying;Magnetization;Coercivity;Spark plasma sintering;
 Language
Korean
 Cited by
1.
Manufacturing Technology for Tape Casting and Soft Magnetic Powder Using by Recycling Scrap of Fe-Si Electrical Sheet, Journal of the Microelectronics and Packaging Society, 2016, 23, 2, 11  crossref(new windwow)
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