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    STUDIA PHYSICA - Ediţia nr.1-2 din 2021  
         
  Articol:   SOFT MAGNETIC NANOCRYSTALLINE Ni-Fe-X-Y AND MeFe2O4 POWDERS OBTAINED BY MECHANOSYNTHESIS.

Autori:  IONEL CHICINAȘ, FLORIN POPA, BOGDAN VIOREL NEAMȚU, TRAIAN FLORIN MARINCA, OLIVIER ISNARD, VIOREL POP.
 
       
         
  Rezumat:  
DOI: 10.24193/subbphys.2021.02

Published Online: 2021-12-30
Published Print: 2021-12-30
pp. 19-30

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The soft magnetic nanocrystalline powders, alloys (Ni3Fe, 79Ni16Fe5Mo, 77Ni14Fe5Cu4Mo, wt. %) and zinc ferrite, were obtained by dry and wet mechanical alloying and reactive milling, followed by different heat treatments. The powders were characterised by X-ray diffraction, scanning electron microscopy, X-ray microanalysis, differential scanning calorimetry, thermomagnetic and magnetic measurements. The X-ray diffraction shown the progressive new phases formation. The crystallite size is between 18-7 nm depending on materials and milling conditions. The particle size is smaller for wet-mechanical alloying comparing with dry-milling. The thermomagnetic measurement shown the Curie temperature of the alloys. The spontaneous magnetisation of the wet-milled and annealed samples is higher than of the molten alloys.

Keywords: mechanical alloying; Ni-Fe-X-Y alloys; soft ferrite; magnetisation; XRD; DSC.
 
         
     
         
         
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