Calculate the degree of freedom for eutectic reaction for an iron-carbon alloy and an iron-chromium-nickel alloy, under 1 atmosphere.

Degree of freedom for eutectic reaction for an iron-carbon alloy under 1 atmosphere. According to phase rule or Gibbs rule. Eutectic reaction for an iron-carbon alloy have binary phase diagram.

F = C-P+2
F = Degree of freedom
C = Number of components
P = The number of phases

Here, in the case
C = 2, P = 2
so, F = 2-2+2=2
The degree of freedom for eutectic reaction for an iron-carbon alloy is 2

For iron-chromium-nickel alloy, the degree of freedom.
Here, in this case three component system give rise to ternary diagrams.
F = C-P+1
C = 3, P = 2
So, F = 3-3+1 = 1.

The degree of freedom for eutectic reaction for an iron-chromium nickel alloy is 1.

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