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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Within the scope of this study, it is aimed to produce and to realize the structural characterization of Nickel Boron nanocrystalline/amorphous, alloy/intermetallic phase powders. Mechanical alloying by high energy ball milling was determined as production method. X-ray diffraction (XRD) for phase analysis, Scanning Electron Microscopy (SEM) for microstructure and morphological analysis, Vibrating Sample Magnetometer (VSM) for change in magnetic properties and Differential Scanning Calorimetry (DSC) for the...
Synthesis and Cytotoxicity Studies on Novel Piperazinylacetamides
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Background: In this study, nine novel compounds, bearing N-[2-(4-substituted piperazine-1-yl)acetyl]-N'-[bis-(4-fluorophenyl)methyl]piperazine structures were synthesized.
Synthesis of boron and zirconium co-doped titanium dioxide nanopowders by the sol-gel technique /
Ağartan, Lütfi; Öztürk, Abdullah; Park, Jongee; Department of Metallurgical and Materials Engineering (2014)
Effects of water/Ti precursor molar ratio (R ratio) and calcination regime on the photocatalytic properties of undoped, boron (B) doped, zirconium (Zr) doped, and B and Zr co-doped TiO2 powders synthesized by sol-gel process were researched. Undoped powders were synthesized for R ratio of 1, 3, 5, 10, 30, and 50 while doped and co-doped powders were synthesized for R ratio of 50. Undoped powders were calcined at 300, 400, and 500oC for 1, 2, and 3 h while doped and co-doped powders were calcined at 300 and ...
Production and characterization of boron containing flame retardant polyamide-6 and polypropylene composites and fibers
Doğan, Mehmet; Bayramlı, Erdal; Department of Polymer Science and Technology (2011)
The main objective of this study was to produce flame retardant polyamide-6 (PA-6) and polypropylene (PP) composites and fibers containing boron compounds. The synergistic effect on flame retardancy of boron compounds (boron silicon containing oligomer (BSi), zinc borate (ZnB), boron phosphate (BPO4), metal oxide doped BPO4 and lanthanum borate (LaB)) with conventional flame retardants were investigated. The synergistic effect of nano-clay with commercial flame retardants was also investigated in order to r...
Production and characterization of layer by layer sputtered single-phase AgInSe2 thin film by thermal selenization
KALELİ, Murat; ÇOLAKOĞLU, TAHİR; Parlak, Mehmet (Elsevier BV, 2013-12-01)
In this study highly stoichiometric and monophase AgInSe2 thin films were prepared by selenization of Ag-InSe precursors and the effect of the annealing temperature on the structural, electrical and optical properties have been investigated. The Se incorporation during selenization process as a function of temperature and the compositions of the samples were determined by energy dispersive X-ray analysis (EDAX). As prepared and selenized films were characterized using X-ray diffraction (XRD), scanning elect...
Citation Formats
A. Fadaie, “Production and structural characterization of iron-boron nanoalloys,” M.S. - Master of Science, Middle East Technical University, 2014.