Chapter 9_Part_12

Chapter 9_Part_12 - The Gibbs phase rule example of a...

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56 MSE 2090: Introduction to Materials Science Chapter 9, Phase Diagrams ¾ In one-phase regions of the phase diagram T and X B can be changed independently. ¾ In two-phase regions, F = 1. If the temperature is chosen independently, the compositions of both phases are fixed. ¾ Three phases (L, α , β ) are in equilibrium only at the eutectic point in this two component system (F = 0). The Gibbs phase rule – example of a binary system 2 Ph C F + = 1 Ph C F + = const P = Ph 3 F = 2 C =
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57 MSE 2090: Introduction to Materials Science Chapter 9, Phase Diagrams Summary ¾ Austenite ¾ Cementite ¾ Component ¾ Congruent transformation ¾ Equilibrium ¾ Eutectic phase ¾ Eutectic reaction
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Chapter 9_Part_12 - The Gibbs phase rule example of a...

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