In Situ TiB2 Reinforced Al-12Si Alloy Composites by Semisolid Processing
Employing a cooling slope technique to produce semisolid slurry, in-situ 3wt%TiB2 particulate reinforced Al-12Si alloy composites have been successfully fabricated by flux-assisted synthesis method. It has been shown that the minute TiB2 particles with size 200-500nm uniformly distribute in the spherical α-Al structure and at the boundary of the eutectic Si. Two groups of contrast experiments with and without flowing on the slope have been performed to investigate the influence of the semisolid processing on the microstructure of the composites. Results have shown that α-Al grain is rather spherical and with an average size of 47.4μm, which indicates semisolid processing can be a potential route to produce metal matrix composites with high strength and good ductility.
Yi Tan and Dongying Ju
Z. N. Chen et al., "In Situ TiB2 Reinforced Al-12Si Alloy Composites by Semisolid Processing", Materials Science Forum, Vols. 675-677, pp. 763-766, 2011