Effects of Hybrid SiC/Al2O3 Particles on the Mechanical Behavior of Al-MMC Prepared by Stir Casting
摘要
The effect of reinforcing the aluminum matrix with different amounts of SiC particles (6, 12, and 18 wt.%) at a constant amount of Al2O3 particles (6 wt.%) on the microstructure and mechanical properties of the metal matrix composite was studied. Reinforced SiC/Al2O3 composites based on Al were produced using the stir casting method. The microstructure of the composites was examined using a scanning electron microscope. Impact toughness, hardness, tensile and compressive strength of the composites were determined. It was found that the reinforcing particles are uniformly distributed in the matrix, providing a strong bond at the interface between aluminum and SiC/Al2O3. It is shown that reinforcement with hybrid SiC/Al2O3 particles increases the hardness and tensile and compressive strength, but reduces the impact toughness and ductility of the composites. It has been revealed that reinforcement of aluminum with hybrid SiC/Al2O3 particles more effectively increases the mechanical properties of the composite compared to reinforcement with SiC particles.