Ternary system

solid-solid phase transformations, influence of stresses and strains
Bernd
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Re: Ternary system

Post by Bernd » Tue Jun 06, 2017 6:52 pm

Dear Sudhindra,

I would consider two possible reasons:

1.) Resolution is not fine enough. This is easily possible because of the extremely small diffusion length at 400°C.

2.) You use a constant small value for the interface mobility which cannot fit for all temperatures. I would try to use mobility correction in order to automatically adjust to diffusion-limited growth:
- increase the mobility by some orders of magnitude (e.g. 1.E-10)
- replace "normal" in the phase diagram data for 1/2 interaction by "normal mob_corr" to adjust mobility automatically to values <1.E-10

Bernd

deepumaj1
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Re: Ternary system

Post by deepumaj1 » Fri Dec 08, 2017 2:02 pm

Dear Bernd,
Can you provide some theoretical background on this automatic mobility correction? How does it account for the change of mobility and what all factors does it consider (Just to get a better idea of how this feature works). Thanks.

Deepu.

Bernd
Posts: 1074
Joined: Mon Jun 23, 2008 9:29 pm

Re: Ternary system

Post by Bernd » Fri Dec 08, 2017 2:32 pm

Dear Deepu,

there is a publication on that which besides the antitrapping current (atc) also explains the mobility correction (mob_corr):

A.Carré, B.Böttger, M.Apel
Implementation of an antitrapping current for a multicomponent multiphase-field ansatz
Journal of Crystal Growth 380(2013)5–13


Bernd

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