Elemental powders of Al (79 vol.%), TM (TM; Ti, Mo and Cu) (1 vol.%) and J3-SiC (20 vol.%) compound were mechanically alloyed using ball-milled technique. The end-product which is a composite Al-SiC-TM nanocrystalline powders was consolidated into compact (20 mm in diameter) using the plasma activated sintering method. The as-milled and as consolidated samples were characterized by means of X-ray diffraction, transmission electron microscopy, scanning electron microscopy and chemical analysis. Moreover, the hardness of the compacted sample was determined using a Vickers indenter with a load of 10 kg, and found to be 2.27 GPa. In addition, the density of the consolidated sample was determined by Archimedes' principle using water immersion and found to be 3×10³ kg.m^-3. The effect of the TM elements on the mechanical properties (Poisson's ratio, Young's modulus and shear modulus) of Al-SiC bulk composite has been studied.