Determine the composition and phase present at point A on Figure 25.5. Temperature 1500 1400 1300 1200-

Determine the composition and phase present at point A on Figure 25.5.

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Temperature 1500 1400 1300 1200- 1100 1000- 900 Liquid 1084 °C A D Solid alloy C B. 1455 °C 0 10 20 30 40 50 60 70 80 90 100 Mole percent nickel Pure Cu Pure Ni A FIGURE 25.5 Cu-Ni Phase Diagram Because copper and nickel have similar crystal structures and similar size, together they can form a solid solution. A solution forms at all compositions from pure copper to pure nickel.