Performance and Mechanism of Fe3o4@Ceo2 Nano-Magnetic Abrasives in Magnetorheological Polishing

Magnetorheological polishing (MRP) is a low-damage surface machining technology where the properties of magnetorheological fluid significantly influence the overall polishing performance. In this study, Fe3O4@CeO2 magnetic abrasive composite particles were synthesized using a homogeneous precipitation method and characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The zeta potential and sedimentation rate of the magnetorheological fluid containing Fe3O4@CeO2 were evaluated, revealing improved stability of the fluid. Magnetic rheological property tests indicated that the addition of Fe3O4@CeO2 enhanced the magnetorheological effect, leading to increased shear and yield stresses, which in turn improved the mechanical properties during the polishing process. Furthermore, the incorporation of Fe3O4@CeO2 magnetic composite abrasives facilitated the uniform distribution of abrasives on the magnetic field surface during magnetorheological polishing, thereby enhancing the stability throughout the polishing process. The optimized magnetorheological fluid effectively polished the glass substrate, achieving a low surface roughness of 1.17 nm.