Abstract In this paper, Terfenol-D/epoxy particulate composites with low eddy current loss are prepared using the particle phosphatizing treatment method. A compound phosphate coating of Tb, Dy and Fe is present on the Terfenol-D particle surface after phosphatizing treatment, identified by surface morphology, composition and chemical status analyses. As a result, the DC resistivities increase by 2–3 orders of magnitude, and the interparticle eddy current loss of the particle phosphatized composites significantly decreases. Moreover, the magnetostriction of the particle phosphatized composites remains at the same level as those of the uncoated state. This research provides an approach to preparing Terfenol-D/epoxy magnetostrictive composites with low eddy current loss for high-frequency applications.

中文翻译：

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颗粒磷化处理法制备的Terfenol-D/环氧树脂颗粒磁致伸缩复合材料的低涡流损耗

摘要 本文采用颗粒磷化处理方法制备了低涡流损耗的Terfenol-D/环氧树脂颗粒复合材料。磷化处理后的 Terfenol-D 颗粒表面存在 Tb、Dy 和 Fe 复合磷酸盐涂层，通过表面形态、成分和化学状态分析确定。结果，直流电阻率增加了 2-3 个数量级，颗粒磷化复合材料的颗粒间涡流损耗显着降低。此外，颗粒磷化复合材料的磁致伸缩保持在与未涂覆状态相同的水平。该研究提供了一种制备用于高频应用的低涡流损耗的 Terfenol-D/环氧树脂磁致伸缩复合材料的方法。