超细α-Fe粒子对磁性粒子浓悬浮体系磁流变性能的增强  

The Enhanced MR Effect of Dense Magnetic Particles Suspensions Consisting of Superfine α-Fe Particles

作　　者：江万权[1] 朱春玲[1] 陈祖耀[1] 周刚毅[2] 张培强[2] 

机构地区：[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

出　　处：《Chinese Journal of Chemical Physics》2001年第5期629-632,共4页化学物理学报（英文）

基　　金：国家自然科学基金 (No .19772 0 4 9);中国科学技术大学材料力学行为和材料设计实验室资助~~

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。It is reported that magnetorheological (MR) effect was enhanced when superfine α-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.

关 键 词：磁性粒子浓悬浮体系 超细粒子 增强效应 磁流变液 α-Fe粒子 铁离子 流变学性能 稳定性 

分 类 号：TB381[一般工业技术—材料科学与工程]