The ingots of (Fe81.5Co1.5Ga17)100-xTbx(x=0, 0.05, 0.10, 0.15, 0.20) series alloys were prepared, and the effects of Tb element addition on the structure and magnetic properties of Fe81.5Co1.5Ga17 alloy were investigated. The results show that the disordered α-Fe body centered cubic structure is the main structure in this series of alloys, the lattice constant of the alloys increase with the addition of Tb element, the change of relative peak strength is consistent with the change trend of lattice constant, alloy preferred orientation in[100]crystal direction. The addition of Tb element precipitates Tb-rich phase and makes the alloy grain refined. With the increase of Tb element content, the Tb-rich phase distribution in the alloy gradually changes from a dispersed state to a continuous network structure and produces dendritic crystals. The saturated magnetostrictive coefficient of the alloys increase first and then decreases with the increase of x value. When x=0.10, the saturated magnetostrictive coefficient of the alloy reached 217×10-6, compared with x=0 alloy, the saturated magnetostrictive coefficient increased by 11%. In this series of alloys, when the magnetic field is less than 40 kA/m, the magnetostrictive rate of x=0 alloy is the highest. When the magnetic field is 40-80 kA/m, x=0.10 alloy magnetostriction rate is the highest. When the magnetic field range is 80-120 kA/m, the magnetostrictive rate of the alloy x=0.20 is the highest. When the magnetic field is greater than 120 kA/m, the alloy magnetostrictive basically reaches saturation, x=0.10, 0.15 alloy has high saturation magnetostrictive coefficient. The saturated magnetization value of this series of alloys increases first and then decreases with the increase of Tb elements. When x=0.05, the saturated magnetization value of the alloys reaches the maximum value of 210.06 emu/g. © 2022, Materials Review Magazine. All right reserved.
