Magnetomechanical performance of directionally solidified Fe-Ga alloys
Magnetomechanical performance of directionally solidified Fe-Ga alloys
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DOI：
10.1063/1.2711701
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发表时间：
2007-05
影响因子：
3.2
通讯作者：
X. Zhao;Nigel J. Mellors;D. G. Lord
中科院分区：
文献类型：
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作者：
X. Zhao;Nigel J. Mellors;D. G. Lord
铁镓合金可以产生~ 400ppm的磁致伸缩，可以作为机械坚固的致动器/传感材料。然而，对于多晶Fe-Ga合金，磁致伸缩性能随着偏离理想的⟨100⟩织构的增加而降低。本文制备了三种镓含量分别为17、18.4和19.5at的定向凝固Fe-Ga合金。%在常温下进行表征。这些样品在施加磁场时表现出高d33和高磁导率，表明它们适用于轻型执行器应用，但由于其低饱和磁致伸缩，因此阻塞力低，因此不适用于高力应用。在51MPa的循环压应力下，所有合金的磁化强度都发生了显著变化，约为0.7Ms-0.8Ms，这使它们成为传感和能量收集应用的有希望的候选材料。然而，涡流效应很容易成为一个问题，当这些材料受到…
Iron-gallium alloys can produce magnetostrictions of ∼400ppm and might serve as mechanically robust actuator/sensing materials. However, for polycrystalline Fe–Ga alloys, the magnetostrictive performance decreases with the increasing deviations from the ideal ⟨100⟩ texture. In this paper, three directionally solidified Fe–Ga alloys with gallium contents of 17, 18.4, and 19.5at.% were characterized at ambient temperature. These specimens exhibit high d33 and magnetic permeability when subjected to applied magnetic fields, indicating their suitability for light weight actuator applications but not for high force applications due to their low saturation magnetostriction and hence low blocking force. All the alloys produce significant changes in magnetization, around 0.7Ms–0.8Ms when subjected to cyclic compressive stresses of 51MPa, making them promising candidate materials for sensing and energy harvesting applications. However, eddy current effects may easily become a problem when such materials are subjec...