Abstract
In this study, we prepared monodisperse spherical particles of a desired diameter using [(Fe 0.5Co 0.5) 0.75B 0.2Si 0.05] 96Nb 4 alloy; the particles were prepared by using an atomization process developed by us. The particles have perfect sphericity and narrow size distribution along with a homogeneous composition. The phase transitions of particles from the fully glassy phase to the crystalline phase via mixed phase structures occurred as the particle diameter was increased; the particles produced in the fully glassy phase in an argon atmosphere had a diameter of less than 300 μm. This allowed the estimation of the intrinsic critical cooling rate for the particles with a fully glassy phase, R c : R c varied in the range of 700–900 K/s and depended only on the initial temperature of the alloy melt.
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