Add a Value to the Gibbs Energy of an Existing Phase
In this example, we are going to add a certain value to the Gibbs energy of a specific phase through a "DG" parameter. This parameter shows the value added to the Gibbs energy of the phase. The syntax is defined as below:
Function Delta_G 298 200; 6000 N !
Parameter DG(Fcc) 298 Delta_G; 6000 N !
When we append the AB_add_DG.tdb to the original database AB_original.tdb, the TDB viewer shows the information as below:
The calculated phase diagrams using both original database and original + appended databases are shown in Figure 3.89
Figure 3.89: Calculated A-B phase diagram using both original database and original + appended databases with DG parameter
Note that adding a value to the Gibbs energy of a phase is different from adding a value to a specific parameter term.