Magnetorheological Characterization Assessment of Composite Magnetic Abrasive Towards Surface-Finishing

A magnetizable composite magnetic abrasive emerges as a compelling solution to the limitations in polishing/finishing engineering materials. An EIP-Al2O3 composite magnetic abrasive was successfully created using powder metallurgy and traditional sintering techniques. Comprehensive analyses, including SEM and VSM examinations, probed the morphology and magnetic properties of the composite particles. The rheological properties of a finishing slurry containing the composite magnetic abrasive (CMA) were measured in a magnetic field (0.5 T) using a parallel plate rotational rheometer. The study also looked into the rheological effects of temperature changes. The rheological attributes of the CMA’s slurry were particularly consistent. Furthermore, minimal temperature-induced changes in rheological properties improve its predictability for surface finishing. A preliminary surface-finishing test on the planar surface of Al-6061 confirmed its exceptional finishing abilities, yielding a Ra value of 88 nm.