PHYSICAL AND MECHANICAL CHARACTERISATION OF ASBESTOS-FREE PARTICULATE CERAMIC MATRIX COMPOSITES

Authors : Stephen DUROWAYE, Olatunde SEKUNOWO, Ganiyu LAWAL

Pages : 562-574

Doi:10.18038/estubtda.622914

View : 15 | Download : 14

Publication Date : 2020-12-28

Article Type : Research Paper

Abstract :Production of friction particulate ceramic matrix composites insert ignore into journalissuearticles values(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 insert ignore into journalissuearticles values(1.87 g/cm 3 );, water absorption insert ignore into journalissuearticles values(0.3 %); indicating reduced pores/voids , hardness insert ignore into journalissuearticles values(147.09 BHN);, compressive strength insert ignore into journalissuearticles values(156.45 MPa);, shear strength insert ignore into journalissuearticles values(5.97 MPa); and impact energy insert ignore into journalissuearticles values(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.
Keywords : Particulate ceramic matrix composites, powder metallurgy, microstructure, physical properties, mechanical properties