1. Of or relating to an alloy or mixture containing a higher proportion of one component than the eutectic composition; having a composition beyond the eutectic point.
Usage: technical; metallurgy and materials science

Examples

• The hypereutectic aluminum-silicon alloy exhibits improved hardness due to its excess silicon content.
• In the phase diagram, hypereutectic compositions lie to the right of the eutectic point.
• Hypereutectic cast irons are valued for their wear resistance in engine blocks.
• The microstructure of a hypereutectic alloy contains primary crystals of the excess phase.
• Engineers selected a hypereutectic composition to achieve the desired mechanical properties.