Optimization of soft magnetic properties and crystallization in FeAgNbSiB, FeAgNbB and FeAgCoNbB amorphous alloys

  • Stokłosa Z
  • Kwapuliński P
  • Rasek J
 et al. 
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In the present paper the influence of 1-h annealing (temperature range from 300 to 800 K) on magnetic, plastic and electrical properties of the Fe75.75Ag0.25Nb2Si13B9, Fe75.75Ag0.25Nb2B22, Fe74.75Ag0.25Co5Nb2B18amorphous alloys were carefully examined. For all the tested alloys the enhancement of magnetic permeability effect was observed - i.e. initial magnetic permeability measured at room temperature for annealed samples shows a sharp maximum. A possible mechanism explaining this effect is discussed in detail. Moreover it was found that at room temperature plastic deformation of the annealed samples depends on the progress of structural relaxation (free volume content). Activation energies and preexponential factors of the first stage of crystallization process were determined from the isochronal resistivity curves measured with different heating rates (Kissinger method). The Curie temperatures from the magnetization curves versus temperature were also determined. © 2010 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Amorphous alloys
  • Magnetic measurements
  • Optimization effects

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  • Z. Stokłosa

  • P. Kwapuliński

  • J. Rasek

  • G. Badura

  • G. Haneczok

  • L. Pajk

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