CALCULATE_FROM_GAS

This command is for the SCHEIL module.

The CALCULATE_FROM_GAS command enables or disables the calculation of equilibria starting from the gas/liquid temperature, i.e. from the temperature above which the liquid phase is no longer stable. By default this is disabled (set to N). Enable this (set to Y) to perform single equilibrium calculations at 5 Kelvin (K) intervals in the two-phase region between the gas/liquid temperature and the liquid/gas temperature, which is the temperature below which the gas phase is no longer stable.

In the fully liquid region below the liquid/gas temperature single equilibrium calculations are performed at 50 K intervals until the liquidus temperature is reached. After that the Scheil solidification calculation proceeds as usual.

Syntax

CALCULATE_FROM_GAS

Prompts

Calculate from gas/liquid temperature? /N/:

The default is N. Enter Y to perform equilibrium calculations from the gas/liquid temperature.

Gas phase name /GAS/:

Enter the name of the gas phase (default GAS).

If you choose a phase that is not available in the system, Thermo-Calc checks if there is any phase present with the phase type code G.