Abstract
In order to study excellent properties of the magnetorheological fluids (MRFs), some relevant patents and researches are studied. Experiment materials, experimental method and test methods are elaborated, and two types of carriers are used to prepare MRFs samples with different additives addition. The microstructures of both uncoated magnetic particles and coated magnetic particles are observed by scanning electron microscope (SEM). The properties of these samples including sedimentation stability, zero field viscosity and shear yield stress are tested and analyzed. Experimental results show that MRFs with mineral oil 350N as their carrier liquid are better than dimethyl silicone oil; Organic Bentonite and TM-618 can improve the sedimentation stability and shear yield stress of MRFs. Moreover, they have influence on zero field viscosity and MRFs with Organic Bentonite 3% and TM-618 3.5% have good overall properties.
Keywords: Magnetorheological fluids, new additives, preparation method, sedimentation stability, shear yield stress, zero field viscosity.
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