Preparation of Magnetic Composite Particles with Core-Shell Structure Mwcnts/Cip@Fe3o4 and Their Tribological Behavior on Single-Crystal Sic

Abstract

AbstractsA one-step hydrothermal method was employed to synthesize magnetic composite particles of MWCNTs/CIP@Fe3O4 with a core-shell structure. Electrochemical magnetorheological friction and wear tests were conducted on single-crystal SiC using a magnetorheological micro-polishing nose fabricated with these particles as the friction pair to elucidate its material removal mechanism. The characterization results demonstrate that MWCNTs/CIP@Fe3O4 particles possess high saturation magnetization and conductivity. The friction results reveal that, at a current density of 15 mA/cm2, the MRR of MWCNTs/CIP@Fe3O4 particles reaches its maximum, exhibiting an increase of 135.23% and 46.98% compared to CIP particles and CIP@Fe3O4 particles, respectively. The core-shell structure of MWCNTs/CIP@Fe3O4 particles significantly enhances both the electrochemical and tribological performance of the magnetorheological micro-polishing nose.

Keywords: Electrochemical magnetorheological polishing, Hydrothermal synthesis method, Magnetic composite particles, Single-crystal SiC