摘要
已有的研究表明,在树脂基磁致伸缩复合材料固化过程中,施加一定的磁场使Terfenol-D颗粒沿磁场方向取向排列可以形成伪1-3型复合结构,其静态磁致伸缩性能较颗粒随机取向的0-3型复合材料有一定程度的提高。本文旨在研究颗粒取向对磁致伸缩复合材料其它性能的影响。以Terfenol-D颗粒体积含量为50%的0-3型和1-3型环氧基磁致伸缩复合材料为研究对象,通过实验和计算对比两种材料的动静态磁致伸缩性能、增量磁导率、弹性模量、磁机械耦合系数。结果表明,颗粒取向不仅可以提高树脂基磁致伸缩复合材料的静态磁致伸缩性能和动态磁致伸缩性能,还能略微提高其弹性模量,但会适度降低其磁机械耦合系数。
Previous studies on polymer-bonded Terfenol-D composites indicated that applying a static magnetic field along the longitudinal direction of the composites during its curing period could align the particulates into chain-like structures, thereby creating the pseudo 1-3 structure, which has been proved effective to improve its magnetostriction. The aim of this paper is to evaluate the effects of particles alignment on the other properties of the composites. Therefore, both 0-3 type （without particles alignment） and pseudo-1 3 type （with particles alignment） epoxy-bonded Terfenol-D composites with 50% particles volume fraction were fabricated in this paper. Besides static magnetostriction, other properties including dynamic magnetostriction, dynamic relative permeability, dependence of electrical impedance on frequency, two Young＇s moduli （E33^H and E33^B）. and magnetomechanical coupling coefficient are studied. Experimental results indicate that, compared to 0-3 type, pseudo-1-3 type magnetostrictive composite exhibits more excellent static and dynamic magnetostricton, slightly larger Young＇s moduli, and smaller magnetomeehanical coupling coefficient.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2008年第5期665-668,共4页
Journal of Materials Science and Engineering
基金
国家自然科学基金资助项目(50478024)
国家重点基础研究发展计划(973计划)资助项目(2007CB714204)
关键词
树脂基磁致伸缩复合材料
TERFENOL-D
取向
磁致伸缩性能
磁机械耦合系数
polymer-bonded magnetostrictive composites
Terfenol-D
alignment
magnetostrictive properties
magnetomechanical coupling coefficient
characteristic frequency
