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    Morphology and magnetic properties of FeCo nanocrystalline powder produced by modified mechanochemical procedure

    , Article Journal of Magnetism and Magnetic Materials ; Volume 322, Issue 21 , 2010 , Pages 3551-3554 ; 03048853 (ISSN) Azizi, A ; Sadrnezhaad, S. K ; Hasani, A ; Sharif University of Technology
    2010
    Abstract
    Properties of FeCo nanocrystalline intermetallic powders prepared by salt-matrix hydrogen reduction of a milled Fe 2O 3-Co 3O 4 mixture were investigated. The product of 72 ks ball-milling at 350 rpm was CoFe 2O 4 nanopowder. Reduction of this powder for 3.6 ks by hydrogen at 750 °C resulted in the formation of Fe 0.67Co 0.33 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....