# What is solidus and solvus?

## What is solidus and solvus?

In an alloy of several substances, precipitation of solids takes place at a certain temperature below the solidus line. The solvus line or area represents the composition of these phases that are in equilibrium with each other as a function of temperature and pressure within the phase diagram.

## What is liquidus solidus and solvus line in phase diagram?

Liquidus, Solidus, Solvus, and Eutectic. Quick. The liquidus is represented by a line on a phase diagram that separates a liquid phase from a solid + liquid phase region. A system must be heated above the liquidus temperature to become completely liquid.

What is meant by solidus line?

The Solidus Line is the line (or lines) on a phase diagram below which only solid is present. Technically it is “the locus of temperatures below which only solid is stable”.

### What is liquidus line?

The liquidus lines on a phase diagram is the locus of all system states that represent the boundary between a single liquid phase and the two phase (liquid + solid) zones on the diagram.

### What is a solvus line?

The solvus line represents the locus of solubility limits for the solid solutions in a multicomponent system. For the copper-silver binary system shown two such lines exist, one for the a-phase and one for the b-phase.

What is solvus curve?

Definition of solvus : a curve on a temperature-composition diagram indicating the limits of solubility of one solid phase in another — compare liquidus, solid solution, solidus.

#### What does solvus line separate?

In a physical or geochemical system, a solvus is a line (binary system) or surface (ternary system) on a phase diagram which separates a homogeneous solid solution from a field of several phases which may form by exsolution or incongruent melting.

What does solidus liquidus and tie line mean?

Mixtures at temperatures above the liquidus line are liquid and mixtures below the solidus line are solid. In the region between the liquidus line and the solidus line, solid and liquid are in equilibrium, with compositions given by the horizontal tie-lines connecting the two curves.

## What is solidus and liquidus line?

In particular, the solidus line defines the temperature below which the phases in the diagram are solid, while the liquidus line defines the temperature above which the phases are completely liquid.

## What is dashed line in phase diagram?

6(c), dashed lines indicate the portions of the liquidus and solidus lines that disappear into the two-phase solid region. These dashed lines represent valu- able information, as they indicate conditions that would exist under metastable equilibrium, such as might theoretically occur during extremely rapid cooling.

What is the solvus temp?

Now, it can be concluded that the solvus temperature is 562.5 ± 1.5 K (289.5 ± 1.5 °C).

### What do each lines in a phase diagram represent?

The lines in a phase diagram correspond to the combinations of temperature and pressure at which two phases can coexist in equilibrium.

What is water critical point?

There’s a special mix of temperature and pressure – we call it the critical point – where the difference between liquid and gas ceases to exist. For water, this happens at 374 °C (705 °F) and 218 atmospheres (normal air pressure is one atmosphere at sea level!).

#### What do the lines on a phase diagram represent apex?

The lines in a phase diagram correspond to the combinations of temperature and pressure at which two phases can coexist in equilibrium. In Figure 12.4.