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

Year 2020, Volume: 21 Issue: 4, 562 - 574, 28.12.2020

Stephen Durowaye , Olatunde Sekunowo Ganiyu Lawal

https://doi.org/10.18038/estubtda.622914

Cited By: 1

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.

Keywords

Particulate ceramic matrix composites, powder metallurgy, microstructure, physical properties, mechanical properties

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