Synthesis and Characterisation of Al 7075 reinforced with SiC and B4C nano particles fabricated by ultrasonic cavitation method

The application of ultrasonic effects to disperse nano sized particles in molten metal has been studied. Based on this technique, nano-sized SiC and B4C particles reinforced with AL7075 aluminium nanocomposites were fabricated. XRD analysis reveals that uniform structure of nano composites was formed in the Al alloy. The microstructure of the nanocomposites was investigated by high resolution scanning electron microscope (SEM). Experimental results show a nearly uniform distribution and good dispersion of the SiC and B4C nanoparticles within the aluminium metal matrix, although some small clusters were found in the matrix. The mechanical properties like tensile strength and micro hardness of nanocomposites have been improved significantly compared to that of pure alloy. The interaction between SiC and B4C nanoparticles with aluminium matrix was investigated.