What is an eutectic point, and what are the three states of a eutectic point?

Question

..but what are the THREE eutectic points, how would they be applied in the case of lyophilization were water goes straight to solid without vapour or liquid pressure via the use psi 670 Kpa + 98*c?

I need more than a basic definition.

Answer 1

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Answer 2

A eutectic or eutectic mixture is a mixture of two or more phases at a composition that has the lowest melting point, and where the phases simultaneously crystallise from molten solution at this temperature. The proper ratios of phases to obtain a eutectic is identified by the eutectic point on a phase diagram. The term comes from the Greek 'eutektos', meaning 'easily melted.'

The phase diagram at right displays a simple binary system composed of two components, A and B, which has a eutectic point. The phase diagram plots relative concentrations of A and B along the X-axis, and temperature along the Y-axis. The eutectic point is the point at which the liquid phase borders directly on the solid α + β phase (A solid phase composed of both A and B), representing the minimum melting temperature of any possible alloy of A and B. The temperature that corresponds to this point is known as the eutectic temperature.

Not all binary system alloys have a eutectic point: those that form a solid solution at all concentrations, such as the gold-silver system, have no eutectic.

Solid products of a eutectic transformation can often be identified by their lamellar structure, as opposed to the dendritic structures commonly seen in non-eutectic solidification. The same conditions that force the material to form lamellae can instead form an amorphous solid if pushed to an extreme.

Answer 3

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What is an eutectic point, and what are the three states of a eutectic point?

Answer 4

A eutectic point is a temperature point where an alloy becomes "slush", an intermittent form of matter between solid and liquid.