Scheil solidification result problem: fraction liquid is always 1

[amy6chunxiao]

Hi, I load the following database and do Scheil solidification, but only find the liquid phase.

https://github.com/materialsgenomefoundation/2021-workshop-material/blob/main/pycalphad/databases/mc_al_v2.032.pycalphad.tdb

My code is as follows:

The phase fraction is：

[richardotis]

Try adding vacancies (VA) to comps. Most of the solid solution phases in that database include an empty interstitial sublattice, and pycalphad will not load them unless vacancies are explicitly included.

[amy6chunxiao]

Hi, when I add (VA) to comps, it raises an error:

ValueError: Number of interstitial sublattices for the disordered phase (1) and the ordered phase (5) do not match. Got substitutional sublattice indices of [].

[richardotis]

Try excluding the GP_MAT phase.

phases = sorted(set(dbf.phases.keys()) - {'GP_MAT'})

[amy6chunxiao]

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