中文摘要：

采用粉末粘结技术制备了Pr0.8Tb0.2（Fe0.4Co0.6）1.88C0.05／树脂复合材料。研究了超磁致伸缩舍金／环氧树脂复合材料的磁致伸缩性质及高频磁性能，并对所制备的磁致伸缩复合材料的磁导率随频率和树脂体积分数的变化规律进行系统研究。结果表明，由于树脂的添加，不仅可以提高复合材料的截止频率和高频磁性能，使其具有良好的高频响应特性，其截止频率达4MHz以上；而且通过适当选择树脂的体积分数，复合材料仍能保持良好的磁致伸缩性能，Pr0.8Tb0.2（Fe0.4Co0.6）1.88C0.05／树脂复合材料样品的A在树脂的质量分数为8％时达最大值，为5．33×10^-4，除树脂含量为12％的样品外，其余复合材料样品的磁致伸缩系数均大于合金样品；当树脂含量为6％和8％时，表现出较优异的频率稳定性及高频响应特性。

英文摘要：

Tb0.2Pr0.8（Fe0.4 Co0.6）1.93-xCxalloys were prepared by arc-melting method. Pr0.8Tb0.2（Fe0.4Co0.6）1.88C0.05/epoxy magnetostrictive composites were prepared by combining technique. The phases and structure of the alloys were determined using a DS-Advance X-ray diffractometer. The magnetostrietion of the alloys and composites was studied by using standard strain gauge technique, and high frequency magnetic properties of the composites were investigated by using Agilent 4294A impedance analyzer. The dependence of the carbon （C） content on the s.trueture, magnetostriction of the alloys and on the magnetostriction, high frequency magnetic properties of the composites were investigated in detail. The results show that the composites have both good dynamic response with a high frequency and magnetostriction properties. The cut-off frequency of composites is higher than 4MHz, and the highest magnetostriction is 5.33 × 10^-4 when the epoxy content is 8wt%. Except for the composite sample with epoxy content 12wt%, the magnetostriction of the composites is larger than of the alloy under a same magnetic field. The magnetostriction of the composite still keeps to be 4.08 × 10^-4 when the volume fraction of E-44 is 12 wt%. Good dynamic response and stability to a high frequency are gained for the composites.