Production and structural characterization of iron-boron nanoalloys

Fadaie, Amir
The purpose of this study was production and structural characterization of Fe-B crystalline /amorphous nanocomposite powders. In the theoretical part of the study, detailed nanoscale structures of Fe80B20 and Fe85B15 metallic glasses were investigated using Molecular Dynamics (MD) method as well as several structural analysis tools. In the experimental part of the study, Fe80B20 and Fe85B15 crystalline /amorphous nanocomposite powders have been synthesized by using surfactant-assisted high-energy ball milling. Then these powders have been examined using X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Differential Scanning Calorimetry (DSC) and Vibrating Sample Magnetometer (VSM). Comparisons have been made for the differences between evolved microstructures via equilibrium solidification, non-equilibrium solidification and solid-state phase transformations during milling operations.Structural analysis revealed that initially observed Fe2B and Fe3B intermetallic phases tend to disappear even at 1-hour milling time and eventually lead to the stabilization of α-Fe nanoparticles and possible formation of amorphous phase by increasing milling time. This resultant structure governs the magnetic behavior of the Fe80B20 and Fe85B15 nanoalloys.


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Citation Formats
A. Fadaie, “Production and structural characterization of iron-boron nanoalloys,” M.S. - Master of Science, Middle East Technical University, 2014.