1-3 型环氧基磁致伸缩复合材料性能
详细信息Static and dynamic properties of Terfenol-D/epoxy 1-3 magnetostrictive composites
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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。
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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
Abstract: 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 ( E33Hand E33B),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. -
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