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The effect of Ni addition on the glass-forming ability (GFA) and soft-magnetic properties of an (Fe1-xNix)75.5B14.5P7Nb3 (x=0-0.6) alloy system were investigated. We found that the addition of Ni was effective in allowing the alloy to approach a eutectic point as well as increasing the thermal stability of the supercooled liquid. By increasing the amount of Ni,the supercooled liquid region (ΔTx),the reduced glass transition temperature Trg (Tg/Tl) and the Y parameter [Tx/(Tg+Tl)] increased from 49 to 75 K,0.540 to 0.594 and 0.373 to 0.405,respectively. As a result,novel (Fe1-xNix)75.5B14.5P7Nb3 bulk metallic glass (BMG) rods with a maximum diameter of 1 mm were synthesized with a composition of x=0.5 and x=0.6 by copper mold casting. These metallic glasses have a moderate saturation magnetization of 0.37-1.20 T with good soft-magnetic properties,i.e. a low coercivity of 1.4-3.3 A/m and a high effective permeability of 13100-20900 at 1 kHz. The simultaneous achievement of a high GFA and good soft-magnetic properties for the FeNi-based alloy system is promising for the future development of BMGs.
The effect of Ni addition on the glass-forming ability (GFA) and soft-magnetic properties of an (Fe1-xNix) 75.5B14.5P7Nb3 (x = 0-0.6) alloy system were investigated. effective in allowing the alloy to approach a eutectic point as well as increasing the thermal stability of the supercooled liquid. By increasing the amount of Ni, the supercooled liquid region (ΔTx), the reduced glass transition temperature Trg (Tg / Tl) and the As a result, the novel (Fe1-xNix) 75.5B14.5P7Nb3 bulk metallic glass (BMG) rods with Y parameter [Tx / (Tg + Tl)] increased from 49 to 75 K, 0.540 to 0.594 and 0.373 to 0.405, a maximum diameter of 1 mm were synthesized with a composition of x = 0.5 and x = 0.6 by copper mold casting. These metallic glasses have a moderate saturation magnetization of 0.37-1.20 T with good soft-magnetic properties, ie, a low coercivity of 1.4 -3.3 A / m and a high effective permeability of 13100-20900 at 1 kHz. The simultaneous achievement of a high GFA an d good soft-magnetic properties for the FeNi-based alloy system is promising for the future development of BMGs.