Studies of the relaxed amorphous phase in the Fe80Nb6B14 alloy

Influence of rare earth elements on crystallization of Fe82Nb2B14RE2 (RE=Y, Gd, Tb, and Dy) amorphous alloys

“…In general, the magnetism of the RE alloying additions causes a decrease of the crystallization temperature (by 4-7 K), an increase of activation enthalpy (by 0.6-0.7 eV) and an increase of the heat of the first crystallization stage (by 3-6 J/g). It is widely accepted that activation enthalpy is an energetic barrier that slows down diffusion processes [1,2,18,19]. Therefore an increase of activation enthalpy is usually connected with an increase of the crystallization temperature.…”

“…The heat of crystallization (the first stage) can be considered as a main driving force for nanocrystallization i.e. for a new local thermodynamic equilibrium on the way to full crystallization [18]. Assuming that, within a given alloy family, crystallization proceeds in a similar way Q T can be recognized as an indicator of the amorphicity degree.…”

Influence of alloying additions (Mo, Mn, Co) on the magnetic properties of FeSiB amorphous alloys

“…1 and 2. It can be seen that in all cases the magnetostriction coefficients increase with increasing magnetic field and show saturation behaviour (see [9][10][11][12][13]). The influence of the alloying additions on the magnetostriction is well seen.…”

Phase structure and magnetic properties of Fe–Nb–B–Tb type of bulk nanocrystalline alloys

“…In context of the present paper the Fe 80 Nb 6 B 14 amorphous alloy has a special meaning. As it was shown in [3][4][5] magnetic properties of such alloy strongly depend on its microstructure, interaction between nanograins and between nanograins and amorphous matrix. Moreover, Nb as an alloying addition causes a slowing down of diffusion processes which shifts crystallization to higher temperatures.…”