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The amorphization and magnetic properties of Fe_(62)Nb_(38) mechanically alloyed powders were investigated. In the initial mechanical alloying processes, the lattice structure of pure Fe is destroyed due to the cold-welding and fracturing, accompanying the reduction of ferromagnetic properties. The M_S value of Fe_(62)Nb_(38) powders with ball-milling time t=6 h is only 48.1 A·m~2/kg. With prolongating of mechanical alloying processes, a solid state amorphization reaction (SSAR) takes place and the Fe-Nb ferromagnetic amorphous phase is formed. With the milling time increasing from 6 to 18 h, the saturation magnetization of Fe_(62)Nb_(38) powders increases with enhancement of the proportion of ferromagnetic amorphous phase in milled powders. The M_S value of the Fe_(62)Nb_(38) amorphous powders is 98 A·m~2/kg, which is very close to the value estimated from dilute model. However, the Curie temperature of the Fe_(62)Nb_(38) amorphous phase is only 206℃, which is much smaller than that of the pure Fe.
In the initial mechanical alloying processes, the lattice structure of pure Fe is destroyed due to the cold-welding and fracturing, accompanying the reduction of ferromagnetic properties . The M_S value of Fe_ (62) Nb_ (38) powders with ball-milling time t = 6 h is only 48.1 A · m ~ 2 / kg. With prolongating of mechanical alloying processes, a solid state amorphization reaction With the milling time increasing from 6 to 18 h, the saturation magnetization of Fe_ (62) Nb_ (38) powders increases with enhancement of the proportion of ferromagnetic amorphous phase in milled powders. The M_S value of the Fe_ (62) Nb_ (38) amorphous powders is 98 A · m~2 / kg, which is very close to the estimated value from dilute model. However, the Curie temperature of the Fe_ (62) Nb_ 38) amorphous phase is only 206 ° C, which is much smaller than th at of the pure Fe.