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Morphology and magnetic properties of FeCo nanocrystalline powder produced by modified mechanochemical procedure |
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| Authors: | A Azizi SK Sadrnezhaad A Hasani |
| Institution: | a Department of New Materials, Materials and Energy Research Center (MERC), P.O. Box 14155-4777, Tehran, Iran b Center of Excellence for Production of Advanced Materials, Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11155-9466, Tehran, Iran c Department of Materials, Faculty of Engineering, University of Semnan, Semnan, Iran |
| Abstract: | Properties of FeCo nanocrystalline intermetallic powders prepared by salt-matrix hydrogen reduction of a milled Fe2O3-Co3O4 mixture were investigated. The product of 72 ks ball-milling at 350 rpm was CoFe2O4 nanopowder. Reduction of this powder for 3.6 ks by hydrogen at 750 °C resulted in the formation of Fe0.67Co0.33 stoichiometric compound. Scanning electron microscopy, electron dispersive spectrometry, X-ray diffraction and vibrating sample magnetometry were used to characterize the nanopowder. Using a salt-matrix (NaCl as a dispersion medium) resulted in the decrease of the reduction temperature and improvement of the morphology and magnetic properties of the nanopowder. Dispersion of the ball-milled product in Hexan resulted in further improvements of the magnetic properties. |
| Keywords: | Fe0 67Co0 33 Mechanochemical Nanocrystalline particle Salt-matrix hydrogen reduction Magnetic property |
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