Abstract
Cupola slag, an industrial waste produced as by-product in producing cast iron. Demand for cast iron is high consequently, there is significant slag formation. These waste slags ends in landfill and pollutes the environment. Pollution due to cupola slag can be reduced by conversion of waste to resource. In this work waste slag has been analysed physically and chemically to understand its conversion potential. An experimental attempt has been made to convert cupola slag to reinforcement in aluminium metal matrix composite (AMC) for fabrication of economic metal matrix composites by stir casting route. Experimental studies are designed to observe the feasibility of waste to resource conversion along with effect of size of reinforcement on the mechanical, physical and microstructural properties of AMCs. The results indicate feasible conversion from waste to resource. Microstructural studies baked by energy dispersive spectroscopy (EDS) and elemental mapping indicates uniform and successful inclusion of reinforcement in the matrix of composites. The grains have been refined by the addition of slag particle in the Al alloy matrix. Microhardness has been increased in composites when compared to base alloy. Coarse (100 μm) reinforcement particle composites are observed to have better mechanical properties than that of fine (40 μm) reinforcement particles.
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