# Under what conditions three phases may coexist for ternary system?

## Under what conditions three phases may coexist for ternary system?

In ternary systems, sometimes three phases coexist, where degree of freedom is zero at a certain temperature. Wherever two-phase regions come across, the intersection point of two boundaries and those of the other two compositions of the coexisting phases make a triangle surrounded by the three tie-lines.

## How many components are in ternary system?

three component
Figure 1 shows a three dimensional representation of the three component (ternary) system ABC. Note that composition is measured along the sides of the basal triangle and temperature (or pressure) is measured vertically.

How many phases are in a ternary phase diagram?

The intersection of three two-phase regions gives a three-phase region. The ternary phase diagram contains a lot of information on the phase behavior of the mixture of three components.

What is tie line in ternary diagram?

Tie lines connect compositions of liquid and vapor phases in equilibrium. Any mixture with an overall composition along a tie line gives the same liquid and vapor compositions. Only the amounts of liquid and vapor change as the overall composition changes from the liquid side of the binodal curve to the vapor side.

### What is meant by ternary system?

a physicochemical system consisting of three components. At constant pressure, the state of a ternary system is unambiguously defined by three variables: the temperature T and the concentrations of two of the system’s components. …

### What is the purpose of ternary diagram?

A ternary diagram is a triangular coordinate system; the edges of the triangle are the axes. Ternary diagrams are used to plot three dependent variables that always add up to a fixed value, for example, to visualize the compositional variations of rocks or minerals.

What is tie line rule?

An isothermal (constant temperature) line through the alloy’s position on the phase diagram when it is in a two phase field, intersecting the two adjacent solubility curves, is called a tie line (yes, that’s the horizontal yellow line on the diagram).