An eutectic system has a composition and temperature at which a liquid is in equilibrium with two distinct solid phases. Cooling liquid of that composition through the eutectic temperature produces both solid phases together.
The transformation in which one liquid produces two solid phases at a binary eutectic composition and temperature under fixed pressure. The resulting two-phase constituent must be distinguished from either individual thermodynamic phase.
The invariant liquid-plus-two-solids equilibrium of a binary eutectic system at fixed pressure. It specifies both the eutectic temperature and the eutectic composition.
A two-solid microstructure formed by the coupled transformation of liquid at a eutectic point. Lamellae and rods are common morphologies. A hypoeutectic alloy can contain both primary crystals and a eutectic microstructure; those microconstituents are not the same accounting categories as its total phase fractions.
The fraction of an alloy that solidifies through the eutectic reaction, equal to the remaining liquid fraction immediately before that reaction in a simple equilibrium solidification path. It differs from the total fraction of either solid phase, and later precipitation can change the phase inventory.
The eutectic composition is the liquid concentration at the eutectic temperature, where liquid and two solid phases coexist. It is a composition coordinate on a phase diagram, not the overall concentration of every sample in an eutectic system.
The eutectic temperature is the temperature of simultaneous liquid–two-solid phase coexistence in an eutectic system. In directional freezing of a solution away from the eutectic composition, a mushy layer can end at this temperature, where its remaining liquid solidifies.
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A eutectic system refers to a specific type of mixture of two or more substances that has distinct melting and solidification characteristics. In a eutectic system, the components are mixed in such a way that their melting point is lower than that of any of the individual components. The term "eutectic" itself comes from the Greek words "eu" meaning well and "tekein" meaning to melt, referring to the mixture's favorable melting behavior.