Effect of SiC Particles Volume Fraction on the Mutual Diffusion of Al and Cu during Fabrication of Al-4.5wt%Cu/SiC via Mechanical Alloying
The effects of volume fraction at different milling times and impact forces, defined as the ball-to-powder weight ratio (BPR), on the elemental diffusion during mechanical alloying process of Al-4.5wt%Cu/SiC composite were evaluated and compared with the SiC free samples (Al-4.5wt%Cu alloy) in the current work. X-ray diffraction patterns of the monolithic and composite samples imply the fact that a higher level of mutual diffusion of constituents, Al and Cu, happened in the matrix in the presence of SiC particles. This effect of the reinforcing particles can be attributed to the increased densities of dislocation and vacancy caused by the presence of SiC particles within the matrix giving rise to increasing the micro-strain, lattice parameter and decreasing the crystallite size.
Andreas Öchsner, Graeme E. Murch and Ali Shokuhfar
E. Mostaed et al., "Effect of SiC Particles Volume Fraction on the Mutual Diffusion of Al and Cu during Fabrication of Al-4.5wt%Cu/SiC via Mechanical Alloying", Defect and Diffusion Forum, Vols. 283-286, pp. 499-503, 2009