磁流变液
聚氨酯
羰基铁
磁强计
色散(光学)
材料科学
饱和(图论)
超顺磁性
复合材料
剩磁
复合数
磁滞
磁性纳米粒子
磁性
多孔性
磁化
磁场
纳米技术
纳米颗粒
凝聚态物理
物理
光学
数学
组合数学
量子力学
作者
Rizuan Norhaniza,Saiful Amri Mazlan,Siti Aishah Abdul Aziz,Ubaidillah Ubaidillah,Nur Azmah Nordin,Noor Sahirah Muhazeli
标识
DOI:10.1088/1361-665x/ababe2
摘要
Abstract Magnetorheological (MR) foam, which is comprised of magnetic particles inside the matrix phase, is capable of changing its physical and rheological properties corresponding to the applied magnetic field. However, the performance of this material seems unsatisfactory due to the nonuniform distribution of magnetic particles throughout the composite area resulting in uneven magnetic properties. Since uniform magnetic properties are significant regarding MR foam, in situ fabrication using a polyvinyl chloride mould can be used to achieve the targetted improvement. MR foam was prepared with various amounts of carbonyl iron particles (CIPs), 0, 35, 45 and 55 wt%, and investigated at three different positions (top, middle and bottom parts) with a vibration sample magnetometer. The results showed that the hysteresis loop at all CIP concentrations of 35, 45 and 55 wt% exhibited superparamagnetic properties with magnetic saturation. The M s of the top, middle and bottom positions were almost the same with a small standard deviation below 2 Am 2 kg –1 . Moreover, it is observed that the effect of porosity results in the enhancement of the magnetic saturation and remanence values. These results reveal the promising uniform magnetic properties of MR foam, which can benefit the industry by helping produce a consistent MR foam.
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