采用区熔定向凝固技术制备了<110>取向(Tb0.36Dy0 64)1-xHoxFe2合金，研究了在0MPa、5MPa、10MPa不同预压力下该合金的磁致伸缩性能，及其磁致伸缩的滞后特性。结果表明：在外加轴向压应力作用下，<110>取向(Tb0.36Dy0 64)1-xHoxFe2合金具有明显的磁致伸缩“跳跃效应”；在x<0.3时(Tb0.36Dy0 64)1-xHoxFe2合金在较宽的温度范围（-60 oC—80 oC）内具有巨磁致伸缩特性；随Ho含量的增加，其磁致伸缩滞后显著降低。在外加压力为0MPa、5MPa、10MPa时，相对于滞后宽度为104Oe，135Oe，166Oe的Tb0.36Dy0.64Fe1.95合金，在Ho含量为x=0.1，即Tb0.324Dy0.576Ho0.1Fe1.95合金滞后宽度减小为93Oe、116Oe、137Oe，减小幅度分别为10.6％、14.1％、17.5％；在Ho含量为x=0.2时，即Tb0.288Dy0.512Ho0.2Fe1.95合金，滞后宽度减小为75Oe、108Oe、129Oe，减小幅度分别为27.9％，20.2％，22.3％，在Ho含量为x=0.3，即Tb0.252Dy0.448Ho0.3Fe1.95合金，滞后宽度减小为54Oe、88Oe、98Oe，减小幅度分别为48.1％，34.8％，41.0％。
The (Tb0.36Dy0 64)1-xHoxFe2 magnetostrictive alloys with <110> orientation were prepared by zone melting directionally solidified method with a velocity of 240mm/h. The magnetostrictive performance and hysteresis of <110> aligned polycrystalline (Tb0.36Dy0 64)1-xHoxFe2 were investigated. An obvious magnetostriction “jump” effect was observed in these samples. The (Tb0.36Dy0.64)1-xHox Fe2 alloys (x<0.3) has the character of giant magnetostrictive with a wide operating temperature range from -60 to 80 oC. The hysteresis, represented by the width of magnetostriction versus the applied field, was reduced due to the addition of Ho. Compared to the Tb0.36Dy0.64Fe1.95 alloy with hysteresis of 104Oe, 135Oe, 166Oe under compressive stress of 0MPa, 5MPa, 10MPa , the magnetostriction hysteresis reduced to 93Oe, 116Oe, 137Oe, by 10.6%, 14.1%, 17.5% for Tb0.324Dy0.576Ho0.1Fe1.95, to 75Oe, 108Oe, 129Oe, by 27.9%, 20.0%, 22.3% for Tb0.288Dy0.512Ho0.2Fe1.95 and to 54Oe, 88Oe, 98Oe by 48.7%, 34.8%, 41.0% for Tb0.252Dy0.448Ho0.3Fe1.95, respectively.
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