Abstract
In this paper aluminium metal matrix composite samples are prepared by reinforcing B4C and ZrO2 in Al5083 using stir casting furnace. In this work, two types of AMMCs are prepared. In first type composite, different weight percentages (wt.%) of the nano reinforcement (ZrO2) are added from 0.6 to 1.8 in aluminium matrix. In the second composite, two nano reinforcements ZrO2 and B4C are combinedly added in the wt.% from 0.6 to 1.8 in AMMCs. The prepared composite samples are tested for their tensile strength, hardness, impact strength and wear rate. The hybrid composites show better values compared to ZrO2 composites for same weight percentages and thereby, weight of material could be reduced. Hardness increases with increase in wt.% of Zro2/B4C reinforcements compared to hardness of Zro2 composites for the same quantity of reinforcement. The impact Strength is high for hybrid composite and the low wear rate for same composite. The SEM study revealed that there is uniform distribution of reinforcements in the matrix material and also observed the better bonding between the base metal and the reinforcements. This material is more useful for aerospace application where high strength to weight ratio is required.
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