Analysis of settlement stability of aqueous magnetorheological fluid for magnetorheological jet polishing

Abstract

Magnetorheological fluid is widely used in magnetorheological polishing as a smart material. The settlement stability of magnetorheological fluids plays a crucial role in determining the final polishing results. However, balancing viscosity growth with improved settlement stability is a challenge. This paper experimentally investigated the effects of different surfactant combinations on the settlement stability and viscosity of magnetorheological polishing fluids, and the experimental results showed that; using the combination of 0.25 ml Span 80 and 0.25 ml Tween 60, the deposition rate of magnetorheological solution was 68.5 %, and the zero-field viscosity was 2.3 mPa·s. Polishing experiments were carried out using the configured magnetorheological fluid, and the surface roughness of the workpiece was improved considerably with good results. Magnetorheological fluids with high settling stability also help to reduce the deposition of nanoparticles on the surface of the workpiece and improve the cleaning effect on the surface of the workpiece.