摘要
已有研究在Terfenol-D颗粒粒径及粒度分布对树脂基磁致伸缩复合材料性能的影响规律上存在分歧。本文中以Terfenol-D为磁致伸缩颗粒,以不饱和聚酯树脂为基体,采用5种窄分布颗粒（30-53μm、53-150μm、150-300μm、300-450μm、450-500μm）和1种宽分布颗粒（30-500μm）制备颗粒体积分数为20%的磁致伸缩复合材料,并测试其动静态磁致伸缩系数、磁机械耦合系数、弹性模量及抗压强度等性能参数。在窄分布颗粒制备的试样中,以53-150μm制备的复合材料的磁致伸缩性能最佳;而采用宽分布颗粒制备的试样其性能优于窄分布颗粒制备的试样。该结果表明,增大颗粒粒径同时具有积极作用与消极作用,其对复合材料磁致伸缩性能的影响取决于哪一个居主导地位。
To solve the conflict about the effects of particle size on magnetostrictive properties of polymer-bonded Terfenol-D composites studied by different scholars,Terfenol-D/unsaturated polyester resin composites were prepared with 20% volume fraction Terfenol-D powders in six particle-size ranges（30～53 μm,53～150 μm,150～300 μm,300～450 μm,450～500 μm and 30～500 μm）.The static and dynamic magnetostrictive properties,magnetomechanical coupling coefficient,Young＇s modulus and compressive strength were tested.The results indicate that the composite with particles of 53～150 μm distribution presents the largest static and dynamic magnetostrictive properties among all the five monodispersed distribution samples.The sample with particle size in 30～500 μm shows even larger response than that with 53～150 μm particle size distribution.It indicates that the particle size plays a double-edged sword on magnetostrictive properties of magnetostrictive composites.The existence of the optimal particle size to prepare polymer-bonded Terfenol-D composites results from the competition between the positive effects and negative effects of increasing the particle size.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2010年第2期1-8,共8页
Acta Materiae Compositae Sinica
基金
国家自然科学基金项目(50478024)
国家973计划项目(2007CB714204)
