Is it possible to have a copper silver alloy that at equilib

Is it possible to have a copper silver alloy that, at equilibrium, consists of a phase of composition 92 wt% Ag-8 wt% Cu, and also a liquid phase of composition 76 wt% Ag-24 wt% Cu? If so, what will be the approximate temperature of the alloy? If this is not possible, explain why.

Solution

Answer:-

It is possible to have a Cu-Ag alloy, which at equilibrium consists of a phase of composition 92 wt%
Ag-8 wt% Cu and a liquid phase of composition 77 wt% Ag-23 wt% Cu. From given figure a horizontal tie line can
be constructed across the + L phase region at about 800°C which intersects the L–( + L) phase boundary at 76
wt% Ag, and also the ( + L)– phase boundary at 92 wt% Ag.