Some Design Considerations on Industrial Applications of Amorphous and Nanocrystalline Alloys

In-situ crystallization of amorphous Fe73−xNbxAl4Si3B20 alloys through synchrotron radiation

“…A lot of compositions have been studied with the aim of improving thermal stability and magnetic properties of the Fe-based bulk glassy alloys in ascast bulk and melt-spun ribbon forms [6][7][8][9][10]. A large supercooled liquid region over 50 K before crystallization was obtained in Fe-(Al, Ga)-(P, C, B, Si), Fe-(Cr, Mo, Nb)-(Al, Ga)-(P, C, B) and (Fe, Co, Ni)-Zr-M-B (M = Ti, Hf, V, Nb, Ta, Cr, Mo and W) systems and bulk glassy alloys were produced in a thickness range below 2 mm for the Fe-(Al, Ga)-(P, C, B, Si) system and 6 mm for the Fe-Co-(Zr, Nb, Ta)-(Mo, W)-B system by copper mold casting.…”

“…These magnetic properties make these alloys promising candidates for several practical applications such as magnetic parts in power transformers [6], data communication interface components, electro-magnetic interference prevention components, magnetic heads, sensors, magnetic shielding and reactors [7]. The challenge in the application of these alloys is to overcome the limitations of amorphous products dimensions in micrometric sizes, such as atomized powder, wires and melt-spun ribbons [12][13][14][15].…”

Crystallization of Fe₆₃Nb₁₀Al₄Si₃B₂₀ Amorphous Alloy

“…In particular, in the partially crystallized state, the structures are known as "nanocrystalline" and consist of an amorphous matrix containing α-Fe nanocrystals which exhibit high effective permeability and low coercive force, plus a high saturation magnetic flux density [11]. These magnetic properties make these alloys promising candidates for several practical applications such as magnetic parts in power transformers [8], data communication interface components, electro-magnetic interference prevention components, magnetic heads, sensors, magnetic shielding and reactors [9,10]. The challenge in the application of this alloys is to overcome the limitations of amorphous products dimensions in micrometric sizes, such as atomized powder, wires and melt-spun ribbons [2,6].…”