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

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.