The influence of hardwood charcoal particles (HWCP) on some mechanical properties and surface morphology of polyester matrix composites (PMC) was investigated in this work. The polyester base matrix was reinforced with varying weight fraction of HWCP. The composites developed were subjected to impact and hardness tests respectively. The morphological characteristics, elemental characterization and quantification of the synthesized composites were also evaluated. From the results, it is revealed that the composites reinforced with the largest particle sized hardwood charcoal (300 lm) absorbed high impact energy before fracture. However, the composites with lower particle sizes (75, 150 & 250 lm) recorded a high hardness values with increasing weight percent of reinforcements incorporated in the polyester matrix composite. These higher values obtained were attributable to better interfacial bonding due to better mechanical interlocking between the HWCP and polyester resin. The EDX results indicated an increase in the contents of calcium, silicon, potassium and aluminium in the reinforced polyester matrix composites. SEM image show the homogeneous distribution of the reinforcement particles in the majorly carbon matrix phase and increased surface roughness of the reinforced polyester matrix composites.

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As long as industrial and agricultural activities go on, wastes will continue to be generated. In view of this, wastes recycling/or conversion to other reusable materials that can be utilize by another up is fast receiving worldwide attention. research work, the assessment of the suitability of melon and snail shell wastes mixtures the surface hardness of mild steel carburization method has been investigated. The carburization process was carried out at the temperatures of 900 0 C, 920 0 C and 940 soaking times of 15, 30, 45 and 60 minutes respectively, and then quenched in water to Thereafter, they were tempered at 250 0 C relieve the residual stresses introduced into the steel specimens as a result of quenching. Standard method was adopted to determine the surface hardness of the carburized and un-carburized test specimens. Micro structure examination was also performed using standard metallographic techniques to observe the microstructures formed. The results of the study showed increase in the surface hardness of all the carburized steel specimens in the different carburizing media. The steel specimens carburized with shell wastes plus 20% melon shell wastes higher hardness values than those carburized with 100% snail shell wastes only. The maximum surface hardness values of 118VHN, 128VHN and 129VHN were obtained at the carburizing temperature 900 0 C, 920 0 C and 940 0 C respectively, for the soaking time of 60 minutes with the specimens carburized @ IJTSRD | Available Online @ www.ijtsrd.com | Volume -2 | Issue -

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