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采用非自耗电弧炉制备了铸态Fe_(81)Ga_(19-x)Y_x(x=0.1,0.2,0.3,0.4,0.5)合金,通过金相观察、X射线衍射分析和磁致伸缩应变测量,研究了Y掺杂对铸态Fe_(81)Ga_(19)合金显微组织结构和磁致伸缩性能的影响。结果显示,Y的掺杂细化了合金的晶粒;掺Y后Fe_(81)Ga_(19)合金的择优取向增强;除了基体相(无序A2相)外,在铸态Fe_(81)Ga_(19-x)Y_x合金中还检测到DO_3相;Fe_(81)Ga_(19)-xYx合金最大饱和磁致伸缩应变在2500 Oe磁场强度下为97×10~(-6),与Fe_(83)Ga_(17-x)Y_x相比饱和磁致伸缩应变显著降低,DO_3相的析出是导致Fe_(81)Ga_(19-x)Y_x饱和磁致伸缩应变降低的原因。
Fe_ (81) Ga_ (19-x) Y_x (x = 0.1,0.2,0.3,0.4,0.5) alloys were prepared by non-consumable electric arc furnace and characterized by metallographic observation, X-ray diffraction analysis and magnetostriction Strain measurement, the effect of Y doping on the microstructure and magnetostriction of Fe 81 Ga 19 alloys was studied. The results show that Y doping refine the grain size of the alloy; the preferred orientation of the Fe 81 Ga 19 alloy increases with the addition of Y; in addition to the matrix phase (disordered A2 phase) The phase of DO_3 was also detected in Ga_ (19-x) Y_x alloy. The maximum saturation magnetostriction strain of Fe_ (81) Ga_ (19) -xYx alloy was 97 × 10 ~ (-6) at 2500 Oe magnetic field, (83) Ga_ (17-x) Y_x is significantly lower than that of the saturated magnetostrictive strain. The precipitation of DO_3 phase is responsible for the decrease of the saturation magnetostriction strain of Fe_ (81) Ga_ (19-x) Y_x.