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研究了Fe81(Ga1-xYx)19(Y=In,Ge;x=0,0.1)合金的相结构,微观结构和磁致伸缩性能。结果表明:铸态和淬火态Fe81Ga19为A2相单相结构,微观组织是均匀的等轴晶;添加In后,合金由A2和富In相两相组成,富In相呈细小的颗粒状沿晶界分布,淬火后,富In相数量减少;添加Ge后,合金保持了A2相结构,晶格常数减小,铸态Fe81(Ga0.9Ge0.1)19合金中存在大量的枝晶,淬火后枝晶消失,成为均匀的等轴晶。铸态Fe81Ga19合金的磁致伸缩系数为3.3×10-5,淬火后提高到了7.2×10-5;添加In后,合金的磁致伸缩系数降低,淬火态Fe81(Ga0.9In0.1)19合金的磁致伸缩系数较热处理前提高了约1倍;添加Ge后Fe-Ga合金的磁致伸缩系数降低,与铸态Fe81(Ga0.9Ge0.1)19合金相比,淬火后磁致伸缩系数提高了约2倍。
The phase structure, microstructure and magnetostrictive properties of Fe81 (Ga1-xYx) 19 (Y = In, Ge; x = 0,0.1) The results show that the as-cast and quenched Fe81Ga19 are single-phase structure of A2 phase and the microstructure is uniform equiaxed. After adding In, the alloy consists of two phases, A2 and In-rich phase, After quenching, the number of In rich phase decreases. When Ge is added, the alloy maintains the A2 phase structure and the lattice constant decreases. A large amount of dendrites exist in the as-cast Fe81 (Ga0.9Ge0.1) 19 alloy. After quenching The dendrites disappear and become uniform equiaxed grains. The magnetostrictive coefficient of as-cast Fe81Ga19 alloy is 3.3 × 10-5, and the as-quenched Fe81 (Ga0.9In0.1) 19 alloy increases to 7.2 × 10-5 after adding In. , The magnetostriction coefficient increased by about 1 time compared with that before heat treatment. The magnetostriction coefficient of Fe-Ga alloy decreased with the addition of Ge. Compared with the as-cast Fe81 (Ga0.9Ge0.1) 19 alloy, the magnetostriction coefficient Increased by about 2 times.