Abstract
Aluminium matrix composites have become popular for new age applications mainly because of their light weight and high specific strength and find applications in the field of aerospace, automobile and defence. In the present study, aluminium matrix composites consisting of aluminium as the matrix and certain iron fillers added as reinforcement were prepared by powder metallurgy processing. The effect of iron addition on the microstructure and mechanical properties of aluminium matrix composites were studied. Aluminium powders (70 µm) and iron powders (60 µm) were mixed properly to prepare 5 wt%, 10 wt% and 15 wt% Fe-Al composites (weight fraction). Unlike Al-5 wt% and 10 wt%. Fe the addition of 15 wt% Fe on Al matrix composite showed the presence of Al13Fe4 intermetallic phase in XRD analysis, which was responsible for enhanced properties of the composite. The hardness was found to increase with increasing iron content and the highest value of HV 51.03 was found in Al-15 wt% Fe composites. The electrical conductivity decreased with increasing value of Fe content in the composite.
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