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首页> 外文期刊>The Journal of Chemical Physics >Magnetic field induced inversion in the effect of particle size on powder cohesiveness
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Magnetic field induced inversion in the effect of particle size on powder cohesiveness

机译：磁场引起的反演对颗粒内聚力的影响

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摘要

Experimental measurements are reported on the tensile yield stress of magnetofluidized beds of fine magnetic powders operated in the cross-flow configuration. In the absence of externally applied magnetic field the yield stress of the powder depends on particle size as expected, i.e., it increases as bead size is decreased. This trend is however inverted when an external magnetic field is applied. It is suggested that the average orientation of interparticle contacts relative to the direction of the field as affected by particle size plays a relevant role on the magnetic yield stress of these systems.
机译：实验测量报告了在错流配置下操作的细磁性粉末的磁化床的拉伸屈服应力。在没有外部施加的磁场的情况下，粉末的屈服应力取决于预期的粒径，即，随着珠粒尺寸的减小而增加。然而，当施加外部磁场时，该趋势被反转。提出了受颗粒尺寸影响的颗粒间接触相对于磁场方向的平均取向对这些系统的磁屈服应力起着重要的作用。

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