摘要
分析了Tefernol-D颗粒体积含量为53%的环氧基磁致伸缩复合材料的显微结构,测试了Terfenol-D/环氧树脂复合材料及相应Tefernol-D的动静态磁致伸缩性能及增量磁导率,通过阻抗频率谱分析计算得到了2种材料的弹性模量、磁机械耦合系数和截止频率等重要的性能参数。结果表明,由于树脂基体隔断了Terfenol-D颗粒间的导通,与Terfenol-D相比,Terfenol-D/环氧树脂复合材料的动静态磁致伸缩性能及磁导率、弹性模量、磁机械耦合系数均有不同程度的降低,但其许用频率却提高了2个数量级,因此更适用于高频超声领域。
The microstructure of an epoxy-bonded Terfenol-D 1-3 type composite with 53 % particle volume fraction was analyzed. To evaluate static and dynamic properties of the composite and monolithic Tefernol-D, such parameters as static and dynamic magnetostriction, dynamic relative permeability, the dependence of electrical impedance on frequency, two Young＇s moduli （E33^H and E33^B）, magnetomechanical coupling coefficient, and characteristic frequency, were tested. The experimental results indicate that both magnetostrictive properties and Young＇s moduli of the composite are less than those of those of monolithic Terfenol- D, but its characteristic frequency is much higher than that of the later, which suggestes that the composite can provide superior high frequency performance compared with monolithic Terfenol-D.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2008年第3期45-50,共6页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(50478024)
关键词
树脂基磁致伸缩复合材料
TERFENOL-D
磁致伸缩性能
增量磁导率
磁机械耦合系数
截止频率
polymer-bonded magnetostrictive composites
Terfenol-D
magnetostrictive properties
dynamic relative permeability
magnetomechanical coupling coefficient
characteristic frequency
