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The Enhanced MR Effect of Dense Magnetic Particles Suspensions Consisting of Superfine α-Fe Particles
Jiang Wanquana1, Zhu Chunlinga1, Chen Zuyaoa1, Zhou Gangyib2, Zhang Peiqiangb2
1.Department of Chemistry, University of Science and Technology of China, Hefei 230026;2.Department of Mechanics and Mechanical Engineering, University of Science and Technology of China, Hefei 230026
Abstract:
It is reported that magnetorheological (MR) effect was enhanced when superfineα-Fe particles and other nanosize particles were added to suspensions of dense micron magnetic particles. The effect of adding superfine particles on dynamics shear stress, sedimentation stability and structure of solidified MR of magnetic suspensions were studied. The experiment showed considerable increase of shear stress and much stability of sedimentation when the suspension consisting of superfine particles. The enhanced MR effect by superfine particles dealt with the properties, weight ratio and scale of superfine particles.
Key words:  Dense micron particles suspension, Superfine particle, MR effect enhanced
FundProject:国家自然科学基金(No.19772049)及中国科学技术大学材料力学行为和材料设计实验室资助.
超细α-Fe粒子对磁性粒子浓悬浮体系磁流变性能的增强
江万权1, 朱春玲1, 陈祖耀1, 周刚毅2, 张培强2
1.中国科学技术大学化学系合肥 230026;2.中国科学技术大学力学和机械工程系合肥 230026
摘要:
报道在磁性粒子浓悬浮体系中加入球磨超细α-Fe粒子对其磁流变性能的影响,主要研究其动态屈服应力的变化,沉降稳定性的改变以及超细粒子对相变结构的可能影响.超细α-Fe粒子的加入,能使磁性粒子浓悬浮体系的抗剪切能力有明显变化,悬浮稳定性增强.对其它几种超细粒子实验结果进行了简要讨论.超细粒子对磁流变性能影响程度取决于加入物与磁性颗粒的重量比例、加入物质的性质以及所加入超细粒子的尺寸.
关键词:  磁性粒子浓悬浮体系  超细粒子  增强效应
DOI:10.1088/1674-0068/14/5/629-632
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