Spinodal Property Model Settings

Spinodal is a General Property Model available when using the Property Model Calculator in Thermo‑Calc and it calculates the spinodal line.

For theory, see About the Spinodal Property Model. For an example, see PM_G_08: Spinodal.

Configuration Settings

These settings are found on the Property Model Calculator when Spinodal is selected under General Models.

When working in the Configuration window, click the Description tab for more information about the Model.

For the details about the Condition Definitions, Calculation Type, Timeout in minutes, Parallel Calculation, and other calculation associated settings, see Property Model Calculator: Configuration Window Settings.

From the Spinodal phase list select the applicable phase you want to search for the spinodal.

From the Condition to vary list select an option to vary when searching for the spinodal. Up to two spinodals can be found. These options are Temperature or those based on the Composition (e.g. Fe, Cr, and so forth) and Composition unit (i.e. Mass percent, Mole percent, Mass fraction, or Mole fraction).

The Manual search limits checkbox is not selected by default and this sets automatic search limits.

Select the checkbox to enter user-defined search limits in the fields. Enter the Lower condition limit and Upper condition limit. Then enter the number of steps when estimating the position(s) of the spinodal(s)in the Steps when estimating spinodal field.

Plot Renderer Settings

Plot Renderer and Plot Renderer: Configuration Settings

When setting up your calculation on the Plot Renderer and/or Table Renderer, the following axis variables are available for the conditions defined on the Property Model Calculator.

When selecting quantities on the Plot Renderer or Table Renderer, the quantity names include an abbreviated name for the Property Model it is associated to. This is useful in particular when you are calculating two or more Property Models that share names for the quantities. The short name identifying the specific Property Model is included in parentheses after the name of the quantity. Below are the full and abbreviated names for each Property Model.

For a list of the abbreviations associated to a Property Model, see Result Quantities: Property Model Abbreviations.

Select from these plot quantities:

  • Composition
  • Spinodal temperature: The first spinodal when the search condition is temperature.
  • Spinodal temperature - 2nd solution: The second spinodal when the search condition is temperature.
  • Spinodal: The first spinodal regardless of search condition type.
  • Spinodal - 2nd solution: The second spinodal regardless of search condition type.