The Kinetic Peculiarities of the Nanocrystallization of Amorphous Alloys Fe84Nb2B14, which are Doped by Rare Earth Metals

  • L. Boichyshyn Ivan Franko National University of Lviv
  • M.-O. Danyliak Ivan Franko National University of Lviv
  • B. Kotur Ivan Franko National University of Lviv
  • T. Mika lboichyshyn@yahoo.com
Keywords: Amorphous alloys, Crystallization, Kinetics models, Activation energy

Abstract

The thermal stability and crystallization of the Fe82Nb2B14RE2 (RE = Y, Gd, Tb, Dy) amorphous alloys were investigated by differential scanning calorimetric (DSC) method. By X-ray diffraction (XRD) method has been established that the initial AMA have amorphous structure. The RE alloying of Fe82Nb2B14RE2 amorphous alloys increase the nanocrystallization temperatures for ~ 110 K and activation energies of crystallization for ~ 330 kJ/mol. The Avrami constant was found to be 1.86 for Fe84Nb2B14 at 703 K, 1.17 for Fe82Nb2B14Y2 at 813 K, 1.36 for Fe82Nb2B14Gd2 at 808 K, 1.76 for Fe82Nb2B14Tb2 at 808 K and 1.92 for Fe82Nb2B14Dy2  at 808 K. Two-dimensional diffusion controlled growth mechanism with decreasing nucleation rate was observed in the alloys.

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Published
2017-03-15
How to Cite
Boichyshyn, L., Danyliak, M.-O., Kotur, B., & Mika, T. (2017). The Kinetic Peculiarities of the Nanocrystallization of Amorphous Alloys Fe84Nb2B14, which are Doped by Rare Earth Metals. Physics and Chemistry of Solid State, 18(1), 122-128. https://doi.org/10.15330/pcss.18.1.122-128
Section
Scientific articles