DEVELOPMENT AND CHARACTERIZATION OF MAGNETIC ABRASIVE PARTICLE USING SOLID PHASE SINTERING

Abstract

Magnetic abrasive particles (MAPs) have been developed using solid phase sintering method. Carbonyl iron powder of 20 volume% and silicon carbide abrasives of 3000 mesh size with 25 volume% have been uniformly mixed in ball mill. After mixing the powder, the pellets of 5 gram each have been prepared at 8 ton pressure using cylindrical die of 7 mm diameter and 50 mm length. The pellets have been sintered at 1000°C in inert atmosphere of argon using appropriate sintering cycle. After sintering, the furnace cooling was done in inert atmosphere of argon upto environment temperature. After sintering, the sintered pellets have been crushed in ball mill to obtain the required size of the magnetic abrasive particles. The morphology and elemental composition as well as particle size of magnetic abrasive particles have been studied with scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). The different phases of magnetic abrasive particles have been studied using X-ray diffraction (XRD). The microstructure of magnetic abrasive particles has also been studied with optical microscope.