Abstract
Production of friction particulate ceramic matrix composites (PCMCs) by powder metallurgy method was carried out using iron 105 μm millscale, 50 μm silica sand, 80 μm magnesia and 53 μm bentonite clay as input materials. Different formulation of the blend of these materials were prepared and the composites were produced. Microstructural, water absorption, and mechanical characterisation were determined using standardised methods. The ceramic composites exhibited very good properties in terms of density, water absorption, hardness, compressive strength, shear strength and impact energy. The specific values of these properties exhibited by sample D in terms of density (1.87 g/cm3), water absorption (0.3 %) indicating reduced pores/voids, hardness (147.09 BHN), compressive strength (156.45 MPa), shear strength (5.97 MPa) and impact energy (7.62 J) are desirable. The uniform dispersion of the particles as observed in the microstructure and strong bonding/adhesion contributed to the enhancement of the properties. These results compared favourably well with that of conventional automobiles brake pads which is an indication that the composites are very suitable for application as automobiles brake pads.
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