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In this study, fabrication of Al based  in situ  composites and their formation mechanism is investigated through the stir casting approach.  In situ  composites were prepared with the addition of various amounts of V 2 O 5  particles in pure aluminum. Due to the reaction of vanadium pentoxide with the molten aluminum, Al 2 O 3  (alumina) is formed. X-ray diffraction (XRD), scanning electron microscopy (SEM) and microscopy were used for the examination of the produced  in situ  composites. Increment in hardness was observed in cast  in situ  composites as compared to the pure aluminum. Friction and wear behaviors of cast  in situ  composites were studied by using a pin on disc tribo tester. The investigation showed that the wear loss and coefficient of friction increases with the load. The result indicates that wear rate increases with higher percentage of addition. The different phases formed are shown by the XRD study and the presence of Al 3 V and alumina in the composite enhanced the properties.

Microstructure and wear behavior of Al-Al 2 O 3 in situ composites fabricated by the reaction of V 2 O 5 particles in pure aluminum