Use of Waste Flyash in Fabrication of Aluminium Alloy Matrix Composite

摘要

Waste flyash from two different industries (named as type A and type B) were utilized as reinforcement in fabricating aluminium alloy based matrix composites (AMC). The AMCs were fabricated by continuous stir-casting method in a bottom pouring furnace at 7000C. Casting was made in rectangular metal mould having dimension 250x20x45 mm3. Effect of adding different flyash contents were realized thorough various mechanical behaviour tests. For measuring mechanical properties such as Brinell hardness, impact strength, compression strength, tensile strength, and micro hardness of both the AMCs, samples were prepared as per the standards in the mechanical workshop. The flyash distributions in the AMCs were confirmed through microstructure examination conducted on image analyzer and scanning electron micrographs. Results revealed that there is a great effect of reinforcing different flyash in aluminium alloy matrix composites. Type B flyash gave more enhanced mechanical properties compared to type A flyash. Thus, selection of flyash for reinforcement was found one of the most important criteria for fabricating aluminium matrix composites.