中文摘要：

以粉末粘结、模压成型方法，研制了0-3型的E-44环氧树脂基稀土-铁系超磁致伸缩复合材料。采用电阻应变片技术与Agilent 4294A型动态阻抗分析仪，研究了超磁致伸缩合金／环氧树脂复合材料的磁致伸缩性能及高频磁性能，并对所制备的磁致伸缩复合材料的磁导率、截止使用频率等随频率和树脂体积分数的变化规律进行了系统研究。结果表明：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30MHz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，当树脂体积分数分别为20％、30％时，磁致伸缩系数分别达808×10^-5、821×10^-5，而当复合材料中树脂的体积分数为50％时，其磁致伸缩系数仍高达592×10^-6。探讨了树脂／磁致伸缩复合材料的磁电耦合机制。

英文摘要：

Polymer-matrix Re-Fe giant magnetostrictive composites were prepared by combining 0-3 type magnetostrictive alloy （Tb0.3 Dy0. 7 Fe1.93 ） and epoxy （E-44）. The magnetostriction and high frequency magnetic properties of the composites were studied by using the standard strain gauge technique and Agilent 4294A impedance analyzer. The dependence of permeability, cut-off frequency properties on the frequency and the volume fraction of E-44 was 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 30 MHz, and their magnetostriction is 808×10^-6 and 821×10^-6 when the volume fraction of E -44 is 20% and 30%. The magnetostriction of the composite still keeps to be 592×10^-6 when the volume fraction of E-44 is 50%. The high frequency response mechanism of the magnetostrictive composite was analyzed.