Hypereutectic pistons are used in internal combustion engines and are cast using a hypereutectic alloy - one which has a composition beyond the eutectic point. Hypereutectic pistons are made of an aluminum alloy which has much more silicon present than is soluble in aluminum at the operating temperature. Hypereutectic aluminum has a lower coefficient of thermal expansion, which allows engine designers to specify much tighter tolerances.
Write a CommentCOMMENTS