|About this Abstract
||Materials Science & Technology 2020
||Metallurgy and Magnetism
||Processing of Vitreous Fe-based Wires into Nanostructured Soft Magnetic Material
||Ayodele Oladimeji Olofinjana, James Henry Kern, Nyok Y Voo
|On-Site Speaker (Planned)
||Ayodele Oladimeji Olofinjana
Ribbon shaped metallic glass annealed into nanocrystalline are known to exhibit unique soft magnetic properties. The magnetic softness is attributed to the averaging of the magneto-crystalline anisotropy due to the crystals smaller than the magnetic exchange correlation length. Since wire-shaped metallic glass are known exhibits uniquely soft magnetic properties, this work is, therefore, aimed at studying the devitrification of wire-shaped vitreous alloys. The devitrification of the wires were followed in a differential scanning calorimeter. The devitrification process is typically represented by two thermal events as event markers to follow the nano-crystallisation process. It is shown that only those compositions with large peak separations can be annealed to a single-phase nanocrystalline structure with an average grain size 10 -15nm. The formation of the nanostructure is guided using DSC peak separation and XRD line broadening is used to confirm the existence of nanosized α-Fe(Si) similar to the structure in magnetically soft finemet.