【摘要】 制备目标成分为Fe_83-xCo_xGa₁₇（x=0,0.5,1.5,2.5,3.5）系列的合金铸锭,研究了Co元素添加对该系列合金结构、磁致伸缩性能、磁性能及硬度的影响。实验结果表明,随着Fe-Ga合金中Co元素的增加,合金饱和磁致伸缩值先增加后降低,在x=1.5时,合金饱和磁致伸缩值最高,达到195·10^-6,并且该成分合金在低场下具有高的磁致伸缩率。同时还发现,Fe_83-xCo_xGa₁₇系列合金相结构均为无序α-Fe体心立方结构,并且Co元素添加后,合金产生晶格畸变,该系列合金晶格常数随Co元素加入的变化表现为先减小后增大,与饱和磁致伸缩值先增后减的变化相对应。加入适量的Co元素还可以提高Fe-Ga升合金的饱和磁化强度,在x=1.5时达到195.6 emu/g,同时降低合金矫顽力,并提高合金硬度,在x=3.5时,合金硬度相比于Fe-Ga合金提升近15%。更多还原

【Abstract】 The target composition of Fe_83-xCo_xGa₁₇（x=0,0.5,1.5,2.5,3.5） series alloy ingots are prepared, and the effect of Co addition on the series alloy structure, magnetostrictive properties, magnetic properties and hardness are studied. The experimental results show that as the increasing of Co in Fe-Ga alloy, the saturated magnetostrictive value of the alloy increases first and then decreases. When x=1.5, the saturated magnetostrictive value of the alloy is the highest, reaching 195 ppm, and the component alloy has a high magnetostrictive rate at a low field. And we also find that the phase of Fe_83-xCo_xGa₁₇ series alloys is a disordered α-Fe body-centered cubic structure, with the increase of Co element. The lattice constant of this series of alloys decreases first and then increases with the addition of Co, corresponding to the change of saturated magnetostrictive value. The saturation magnetization of Fe-Ga alloy can be improved by adding appropriate Co element, reaching 195.6 emu/g at x=1.5, and reduce the coercive force. When x=3.5, the hardness of the alloy is increased by nearly 15% compared with Fe-Ga alloy.更多还原