9.32 For a copper-silver alloy of composition 30 wt% Ag-70 wt% Cu and at 775℃(1048K), do the following:
(a) Determine the mass fractions of and phases.
(b) Determine the mass fractions of primary and eutectic microconstituents.
(c) Determine the mass fraction of eutectic .
Solution
(a) From the Cu-Ag phase diagram
(b) From the Cu-Ag phase diagram，the mass fractions of primary is
From the Cu-Ag phase diagram，the mass fractions of eutectic microconstituent is
(c) From the Cu-Ag phase diagram，the mass fraction of eutectic is
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