tvåfasregion
A tvåfasregion, in thermodynamics and materials science, is a region in a phase diagram where two distinct phases are in thermodynamic equilibrium. In this region, a system with a given temperature, pressure and composition would not remain a single homogeneous phase, but would separate into two coexisting phases with different compositions and properties. The overall composition is a weighted average of the two phase compositions.
In binary systems, phase diagrams plotted as temperature versus composition show two-phase regions bounded by phase
Common examples include water–ice–vapor regions in honest phase diagrams of pure substances, such as solid–liquid coexistence
The concept highlights that the properties of a material in a two-phase region depend on the properties