Study of Crystallization Process in V-substituted Finemet Alloys

نویسندگان

  • Vladimír KOLESÁR
  • Vladimír GIRMAN
  • Pavol SOVÁK
  • Karel SAKSL
چکیده

Nanocrystalline soft magnetic alloys can be produced by partial crystallization of amorphous precursor. The aim of this paper was to study the influence of Nb substitution by vanadium (V) in Fe73.5Cu1Nb3-xVxB9Si13.5 (x=1.5, 3) alloys on their crystallization process and the glass forming ability because the growth of the α-Fe(Si) crystals is reduced by (Nb) diffusion barrier. Amorphous ribbons were prepared by melt-spinning technique. Crystallization process of amorphous alloys was examined by Different thermal analysis (DTA) in order to determine the crystallization temperatures and by X-ray powder diffraction measurements (XRD). Atomic pair correlation function G(r) and Radial distribution function R(r) has been calculated for better characterisation of as-quenched samples. It was found that higher V content accelerates crystallization process and causes worse glass forming ability. From DTA measurement was found decreasing of crystallization temperatures with higher V content.

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تاریخ انتشار 2010