eutectic

enUK

eu·tec·tic

E0244400 (yo͞o-tĕk′tĭk)adj.1. Of, relating to, or formed at the lowest possible temperature of solidification for any mixture of specified constituents. Used especially of an alloy whose melting point is lower than that of any other alloy composed of the same constituents in different proportions.2. Exhibiting the constitution or properties of such a solid.n.1. A eutectic mixture, solution, or alloy.2. The eutectic temperature.

[From Greek eutēktos, easily melted : eu-, eu- + tēktos, melted (from tēkein, to melt).]

eutectic

(juːˈtɛktɪk) adj1. (Chemistry) (of a mixture of substances, esp an alloy) having the lowest freezing point of all possible mixtures of the substances2. (Chemistry) concerned with or suitable for the formation of eutectic mixturesn3. (Chemistry) a eutectic mixture4. (Chemistry) the temperature on a phase diagram at which a eutectic mixture forms[C19: from Greek eutēktos melting readily, from eu- + tēkein to melt]

eu•tec•tic

(yuˈtɛk tɪk)

adj. 1. of greatest fusibility: said of an alloy or mixture whose melting point is lower than that of any other alloy or mixture of the same ingredients. 2. of or pertaining to such a mixture or its properties: eutectic salts. n. 3. a eutectic substance. [1880–85; < Greek eútēkt(os) easily melted, dissolved]

Thesaurus

Noun

eutectic - a mixture of substances having a minimum melting pointmixture - (chemistry) a substance consisting of two or more substances mixed together (not in fixed proportions and not with chemical bonding)

Translations

eutettico

Eutectic

enUK

eutectic

[yü′tek·tik] (metallurgy) The microstructure that results when a metal of eutectic composition solidifies. (physical chemistry) An alloy or solution that has the lowest possible constant melting point.

Eutectic

a liquid system that, at a given pressure, is in equilibrium with solid phases whose number is equal to the number of components of the system. The liquid system may be a solution or a melt. According to the phase rule, the solidification of a eutectic system occurs at constant temperature, as does the solidification of pure substances. Hence, upon solidification, a eutectic mixture of solid phases having the same composition is formed. For a given system, the melting point of the eutectic mixture is lower than the melting point of a mixture of any other composition.

The eutectic reaction is characteristic of both metallic and non-metallic systems whose components are completely soluble in one another in the liquid state but are only partly soluble or insoluble in the solid state (seeBINARY SYSTEMS and TERNARY SYSTEM). In the phase diagram of a binary eutectic system whose components are not soluble in one another in the solid state (see Figure 1), the liquidus lines T_AE and T_BE of the pure components A and B, respectively, intersect at E, which is called the eutectic point. At E, the liquid L is simultaneously saturated in both components.

Figure 1. Phase diagram of a binary eutectic system whose components are not soluble in one another in the solid state: (FEG) eutectic-temperature line

In engineering, eutectics are widely used as, for example, casting alloys and solders. Cryohydrates, which are eutectic aqueous salt systems, are often used as freezing mixtures.

REFERENCES

Bochvar, A. A. Issledovanie mekhanizma i kinetiki kristallizatsii splavov evtekticheskogo tipa. Moscow-Leningrad, 1935.
Anosov, V. Ia., M. I. Ozerova, and Iu. Ia. Fialkov. Osnovy fiziko-khimicheskogo analiza. Moscow, 1976.

G. V. INDENBAUM

eutectic

eu·tec·tic

eutectic

eu•tec•tic

Eutectic

eutectic

Eutectic

REFERENCES

eutectic

eu·tec·tic

eutectic

Words related to eutectic

noun a mixture of substances having a minimum melting point

Related Words