The copper-silver phase diagram is shown in Figure 11-30. Copper has a higher melting point than silver.

Figure 11-35 A phase diagram for elements A and B (for Problem 11-36).
(a) Is copper element A or element B as labeled in the phase diagram?
(b) Schematically draw the phase diagram and label all phases present in each region (single phase and two phases) of the phase diagram by writing directly on your sketch. Denote the silver-rich solid phase as gamma (γ) and the copper-rich solid phase as delta (δ). Denote the liquid as L.

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