Soft magnetic properties of the Fe72Co10Nb6B12 amorphous alloy

Magnetic, electrical and plastic properties of Fe76Nb2Si13B9, Fe75Ag1Nb2Si13B9 and Fe75Cu1Nb2Si13B9 amorphous alloys

“…based on nickel or cobalt. Moreover magnetic properties of amorphous alloys based on iron can be enhanced by applying a preliminary thermal annealing usually called the optimization annealing [2][3][4][5][6][7][8]. The term enhancement in this context means a significant increase of magnetic permeability correlated with a decrease of magnetic losses.…”

“…The term enhancement in this context means a significant increase of magnetic permeability correlated with a decrease of magnetic losses. In many papers it was shown that depending on chemical composition of an amorphous alloy and parameters of the applied annealing, the improvement of soft magnetic properties can be attributed to the so-called relaxed amorphous phase or to the nanocrystalline phase [1][2][3][4][5][6][7][8][9][10][11][12].…”

Structural Relaxation in Fe78Nb2B20Amorphous Alloy Studied by Mössbauer Spectroscopy

“…2 allow concluding that the observed optimization effect cannot be attributed to iron nanostructure. The significant increase of permeability is due to annealing out of free volume and a reduction of internal stresses, as it was discussed in [6][7][8][9][10][11][12].…”

“…Such a microstructure averages out magnetic anisotropy and gives an enhancement of magnetic permeability. However, as it was shown at first time in [6] in some alloys the optimization effect can be observed without formation of iron nanograins and can be attributed to annealing out of free volume (frozen into material during fabrication) and a reduction of internal stresses [6][7][8][9][10][11][12]. This effect is especially interesting because it allows obtaining very good soft magnets free of embrittlement -the main disadvantage -of nanostructured magnets.…”

Amorphous Alloys/Bulk Metallic Glasses (BMG)

“…It should be noted that although various composition of melt spun amorphous alloy ribbons/metallic glasses have been produced successfully, the high solidification rates involved (10 wires, pulverized and consolidated powders), and hence on the applicative prospects of these materials. Some of the few but important applications of amorphous/glassy ribbons are in transformer cores (soft and hard magnetic properties) (Chrobak et al 2006;Kane et al 2012), hydrogen membrane separators, e.g., during coal gasification (Hara et al 2002;Yamaura et al 2005), bipolar plates, and catalytic membranes in fuel cells, etc. (Fleury et al 2006;Jayalakshmi et al 2012).…”