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Phase transformations of Co-enhanced Finemet amorphous ribbons based on resistance-temperature measurements

T. J. PAPAIOANNOU1, P. SVEC2, D. JANICKOVIC2, C. S. KARAGIANNI1, E. HRISTOFOROU1,*

Affiliation

  1. National Technical University of Athens, Iroon Polytechniou 9, Athens 15780, Greece
  2. Slovak Academy of Sciences, Bratislava, Slovakia

Abstract

Phase transformations of (Fe1-xCox)73.5Cu1Nb3Si13.5B9 {x=0, 0.5, 1} amorphous ribbons, produced by the planar flow technique, were studied using resistance dependence on temperature (R-T) at several linear heating rates and resistance dependence on time (R-t) for isothermal heating values. Differential scanning calorimetry (DSC) measurements were also performed at 10 K/min and 40 K/min heating rates. Isothermally annealed ribbons at various temperature-time sets were investigated with XRD, showing the previous amorphous condition and the resulted crystallized material. The nanostructured grains have been observed by transition electron microscopy (TEM)..

Keywords

Finemet amorphous ribbons, Fe-Co-Cu-Nb-Si-B, DSC, XRD, TEM.

Submitted at: March 13, 2008
Accepted at: May 14, 2008

Citation

T. J. PAPAIOANNOU, P. SVEC, D. JANICKOVIC, C. S. KARAGIANNI, E. HRISTOFOROU, Phase transformations of Co-enhanced Finemet amorphous ribbons based on resistance-temperature measurements, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 5, pp. 1048-1051 (2008)