![]() ![]() ![]() The system can reduce its free energy by existing as a mixture of two phases The free energy of this mixture at composition C is shown as a red point. In the first figure (below) the free energy of unmixed A and B is shown as the diagonal black line. The figures below show that an alloy of composition C can exist in different configurations with differing free energies. The solid shown could either exist as a mixture or as a homogeneous solution of A and B. Below is a schematic free-energy curve for the solid phase of an alloy. the phase or phase mixture with the lowest free energy for a given temperature and composition. \)įree energy curves can be used to determine the most stable state for a system, i.e.
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