(Solved): 23 The copper-silver phase diagram is shown in Figure 11-30. Copper has a higher melting point than ...

23 The copper-silver phase diagram is shown in Figure 11-30. Copper has a higher melting point than silver. Refer to the silver-rich solid phase as gamma $(?)$ and the copper-rich solid phase as delta $(?)$. Denote the liquid as $L$. (a) For an overall composition of $60\%$ B $(40\%\mathrm{A})$ at a temperature of $800^{?}\mathrm{C}$, what are the compositions and amounts of the phases present? (b) For an overall composition of $30\%$ B $(70\%\mathrm{A})$ at a temperature of $1000^{?}\mathrm{C}$, what are the compositions and amounts of the phases nresent? Temperature $\left({}^{?}\mathrm{C}\right)$