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A phase diagram (often also called an equilibrium diagram) is a convenient way of representing the phases present in an alloy system at equilibrium as a function of composition and temperature (remember, pressure is one atmosphere).
Phase Diagram of Copper-Aluminum. Here is the Aluminum - Copper phase diagram. Yes, it is quite complicated - but only if you alloy more then about 53 at% copper. The aluminum - Al2Cu phase diagram; i.e. the part left to the 53 at% Cu, is about as simple as you can have it for two atoms that cannot mix atomically at any large ratio.
Phase diagram for light metals Aluminum-Lithium. There are five phases illustrated; however the BCC Lithium end-member phase shows such limited Aluminum solubility that it hardly appears on this plot.
Phase diagram is a graphical representation of all the equilibrium phases as a function of temperature, pressure, and composition. For one component systems, the equilibrium state of the system is defined by two independent parameters (P and T), (T and V), or (P and V). Pressure-temperature phase diagram for H2O:
There are interactive phase diagrams available for all the binary alloy systems represented in the Library. Click on the system to view its phase diagram. The number of micrographs available for each system is given in brackets, and clicking on the link will display a list of them.
the diagram shows the phases present in all possible alloys of the two metals nickel (ni) and copper (Cu), at all temperatures from 500 to 1500 °C (930 to 2730 °F). Alloy composition is plotted on the horizontal scale, Fig. 1.1 the nickel-copper phase diagram. adapted from ref 1.1.
Up to 70 wt% of zinc can dissolve in aluminium, followed by magnesium (17.4 wt%), copper (5.7 wt%) and silicon (1.65 wt%). We shall see that the addition of these elements can radically alter the properties of pure aluminium. Typical Phase Diagrams.
