A graphical representation of the relationship between environmental constraints (e.g. temperature and sometimes pressure), composition, and region of phase stability, ordinarily under conditions of equilibrium.
Most phase diagrams are prepared by using slow cooling conditions whereby phases are in equilibrium. One can get following important information's from the phase diagrams
- Phases at different composition and temperature
- Equilibrium solubility of one element or compound in another element
- Melting points of different phases in an alloy
- Temperature of solidification or range of solidification of an alloy.
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