MAGNETOSTRICTION, ELASTIC-MODULI, AND COUPLING FACTORS OF COMPOSITE TERFENOL-D
MAGNETOSTRICTION, ELASTIC-MODULI, AND COUPLING FACTORS OF COMPOSITE TERFENOL-D
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DOI：
10.1063/1.355627
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发表时间：
1994-05-15
影响因子：
3.2
通讯作者：
WUNFOGLE, M
中科院分区：
文献类型：
--
作者：
SANDLUND, L;FAHLANDER, M;WUNFOGLE, M
最近发现Terfenol-D合金与绝缘粘合剂的复合材料产生非常大的磁致伸缩。这些复合材料的电阻率达到很高的值，使他们有吸引力的高频应用，需要小的涡流损耗。在本文中的磁致伸缩，磁化强度和杨氏模量的测量下，恒定磁场条件下和恒定的磁通量条件下的报告。从这些测量，磁力耦合因子计算。将其性能与普通金属Terfenol-D和镍的性能进行了比较。两种不同类型的复合材料进行了研究。在第一种类型中，复合材料具有各向同性结构，而在第二种类型中，具有各向异性结构。结果表明，各向异性型是更可取的，因为它具有较高的磁致伸缩和较高的耦合因子。它也清楚地表明，各向异性类型的磁化过程可以解释由一个180度的畴壁运动，然后由磁化旋转。
Recently it was discovered that composites of Terfenol-D alloys with an insulating binder produce very large magnetostrictions. Resistivities of these composites reach high values, making them attractive for high-frequency applications which require small eddy current losses. In this paper the magnetostriction, magnetization, and Young's moduli measurements made under constant magnetic field conditions and under constant flux conditions are reported. From these measurements, magnetomechanical coupling factors are calculated. The properties are compared to those of ordinary metallic Terfenol-D and nickel. Two different types of composites were investigated. In the first type the composite has an isotropic structure and in the second type, anisotropic. It is shown that the anisotropic type is more desirable since it possesses both higher magnetostriction and higher coupling factors. It is also clearly shown that the magnetization process for the anisotropic type can be explained by a 180-degrees domain wall motion followed by a magnetization rotation.