采用真空感应熔炼法, 制备Fe1-xMnx(x=0.30, 0.35, 0.40, 0.50,0.55(原子分数))合金, 在1000 ℃保温24 h, 炉冷至室温. 研究了不同结构Fe1-xMnx合金样品的室温磁致伸缩性能. 结果表明, x≤0.40时, Fe1-xMnx合金样品为γ＋ε双相结构, 并且ε相体积分数随Mn含量增加而减小, 磁致伸缩性能较差; x>0.40时, 合金样品为单一的γ相, 具有良好的磁致伸缩性能. Fe0.50Mn0.50合金样品在1.9 T磁场中的磁致伸缩可达8.73×10-4.
Antiferromagnetic Fe1-xMnx(x = 0.30, 0.35, 0.40, 0.50, 0.55) alloys have been prepared by induction melting method. A homogenization for 24 h at 1000℃ has been carried out on the samples, followed by furnace cooling to room temperature. The microstructure and magnetostrictive properties of Fe1-xMnx samples were investigated. It was found that when x≤0.40, Fe1-xMnx alloys consisted of fcc γand hcp ε phases with poor magnetostrictive property, and the volume proportion of εphase decreased with the increase of Mn content. When x>0.40, the samples were single fcc γ phase and possessed much better magnetostrictive performance. The magnetostriction of Fe0.50Mn0.50 sample reached 873×10-6 in 1.9T magnetic field. The large magnetostriction in γ-Fe-Mn alloy can be attributed to the magnetic-field-induced fcc→hcp structural transformation.
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| [3] | |
| [4] | |
| [5] |
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