Thermally Induced Microstructural Transformations of Fe72Si15B8V4Cu1 Alloy

The inverted hysteresis loops and exchange bias effects in amorphous/nanocrystalline Fe72Cu1V4Si15B8 ribbons at room temperature

“…The presence of traces of other phases in the annealed alloy samples, such as Fe 2 VSi and ε-Cu, was also observed. Crystallization activation energy of α-Fe (Si) phase was determined lower in this alloy than in the other alloys of similar composition, which was explained by a large number of quenched-in nuclei in the as-prepared ribbon [14]. Thermal treatments resulted in transformation of Fe 23 B 6 phase into Fe 2 B phase while during recrystallization α-Fe (Si) phase becomes richer in Si.…”

“…3b). Higher annealing temperatures stimulate a sudden growth, which can be correlated with the presence of vanadium in the alloy [9,14].…”

“…Tab. I Phases present in the as-cast and thermally treated alloy samples [14]. Besides the changes in weight fraction of the phases already present in the as-cast alloy, after annealing at 723 K Fe 2 B phase also begins to crystallize.…”

“…A recent investigation of thermally induced structural transformations of Fe 72 Cu 1 V 4 Si 15 B 8 alloy with combined amorphous/nanocrystalline structure showed that crystallization and recrystallization processes occurred in the temperature intervals from 740 K to 820 K and from 870 K to 930 K, respectively, during which α-Fe (Si) and iron-boron crystalline phases were formed [14]. The presence of traces of other phases in the annealed alloy samples, such as Fe 2 VSi and ε-Cu, was also observed.…”

“…The relative magnetic permeability increases with the increase of temperature up to 773 K, but with further annealing it declines. Also, as the temperature of the treatment rises, the morphological changes on the surface affect its roughness which thereby becomes higher [14].…”