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Phase Diagram

Phase Diagram. EUTECTOID AND PERITECTIC REACTIONS. The Eutectic Reaction. The Peritectic Reaction. Examples: Cu-Zn, Fe-C, Ag-Pt. The Eutectoid Reaction. Examples: Fe-C, Cu-Zn. The Peritectoid Reaction. Examples: Ag-Al, Al-Cu. The Monotectic Reaction. Examples : Cu- Pb.

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Phase Diagram

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  1. Phase Diagram EUTECTOID AND PERITECTIC REACTIONS

  2. The Eutectic Reaction

  3. The Peritectic Reaction • Examples: Cu-Zn, Fe-C, Ag-Pt

  4. The Eutectoid Reaction • Examples: Fe-C, Cu-Zn

  5. The Peritectoid Reaction • Examples: Ag-Al, Al-Cu

  6. The Monotectic Reaction • Examples: Cu-Pb

  7. THE GIBBS PHASE RULE • This rule represents a criterion for the number of phases that will coexist within a system at equilibrium, and is expressed by the simple equation • Pis the number of phases present • F is termed the number of degrees of freedom or the number of externally controlled variables (e.g., temperature, pressure, composition) • Cis the number of components in the system. • Nis the number of non compositional variables (e.g., temperature and pressure).

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