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Phase transformations and electrical and magnetic properties of Fe73.5Cu1Nb3Si15.5B7 amorphous alloy

D. M. MINIĆ1,* , A. MARIČIĆ2

Affiliation

  1. Military Technical Institute in Belgrade, Serbia
  2. Technical Faculty of Čačak, University in Kragujevac, Serbia

Abstract

The structural transformations of the Fe73.5Cu1Nb3Si15.5B7 amorphous alloy under non-isothermal as well as under isothermal conditions were studied. The amorphous alloy was stable up to a temperature of about 480o C when the process of multy-step structural transformations began. The primary crystallization starts by forming Fe3Si as main phase followed by crystallization of three new phases, iron-copper (FeCu4) at 600 o C and iron-niobium-silicon (Fe16Nb6Si) and iron-boron (Fe2B) at 650o C. At temperature above 700 o C, the crystallization two new minor phases occurs, niobium-silicon (Nb5Si3) and iron-silicon (Fe5Si3). With the increase of the temperature the weight, the composition of present phases as well as their weight ratio is slightly changed. It was shown that all observed structural transformations have significant influence on electric and magnetic properties of alloy. The electric resistivity crystallized alloy is higher that amorphous one but the crystallized alloy possesses better magnetic susceptibility and retains the ferromagnetic properties in whole investigated temperature range..

Keywords

Amorphous Materials, Metallic Glasses, Metals and Alloys, Phase Transition, Thermal Analysis, X-ray diffraction spectra.

Submitted at: Jan. 12, 2010
Accepted at: Feb. 18, 2010

Citation

D. M. MINIĆ, A. MARIČIĆ, Phase transformations and electrical and magnetic properties of Fe73.5Cu1Nb3Si15.5B7 amorphous alloy, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 2, pp. 233-238 (2010)