Amorphization and magnetic properties of Fe62Nb38 mechanically alloyed powders
来源期刊：Rare Metals2004年第3期
论文作者：QIN Hongwei, HU Jifan, and YANG Fuming ) state Key Laboratory for Crystal Materials, Department of Physics, Shandong University, Jinan , China ) State Key Laboratory for Magnetisms, Institute of Physics, Chinese Academy of Sciences, Beijing , China
文章页码：231 - 234
摘 要：<正> The amorphization and magnetic properties of Fe62Nb38 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 MS value of Fe62Nb38 powders with ball-milling time t=6 h is only 48.1 A·m2/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 Fe62Nb38 powders increases with enhancement of the proportion of ferromagnetic amorphous phase in milled powders. The MS value of the Fe62Nb38 amorphous powders is 98 A·m2/kg, which is very close to the value estimated from dilute model. However, the Curie temperature of the Fe62Nb38 amorphous phase is only 206℃, which is much smaller than that of the pure Fe.
QIN Hongwei, HU Jifan, and YANG Fuming 1) state Key Laboratory for Crystal Materials, Department of Physics, Shandong University, Jinan 250100, China 2) State Key Laboratory for Magnetisms, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
摘 要：<正> The amorphization and magnetic properties of Fe62Nb38 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 MS value of Fe62Nb38 powders with ball-milling time t=6 h is only 48.1 A·m2/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 Fe62Nb38 powders increases with enhancement of the proportion of ferromagnetic amorphous phase in milled powders. The MS value of the Fe62Nb38 amorphous powders is 98 A·m2/kg, which is very close to the value estimated from dilute model. However, the Curie temperature of the Fe62Nb38 amorphous phase is only 206℃, which is much smaller than that of the pure Fe.
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