What is metal-matrix composite die cast production?
A. Metal matrix composites (MMC) are mostly aluminum-based alloys reinforced with up to 20% silicon carbide (SiC) particles. The mechanical properties of ASTM test specimens made from these materials typically match or approach many of the characteristics of iron castings and steel, at lighter weight. Properties can exceed those of most Al, Mg, Zn or Cu components commonly produced by die casting. Al MMC parts offer higher stiffness and thermal conductivity, improved wear resistance, lower coefficient of thermal expansion, reduced porosity, and higher tensile and fatigue strengths at elevated temperature, with densities within 5% of Al die casting alloys. Al MMC alloys can be cast on conventional die casting machines but the availability of custom die casting production is still limited.
