Phase-field simulation of nucleation and growth in a ternary eutectic

Nucleation in a four-phase ternary system. The system is initially a metastable liquid phase with composition 35% red, 31% green, 34% blue. The temperature in this model is low enough that there is no stable liquid region, although there is a region in the center of the phase diagram where the free energy curve for the liquid is lower than all of the solid curves. As nuclei grow, spinodal decomposition appears to occur in front of the advancing interfaces.

Halfway through the simulation the temperature is increased. There is still no stable liquid region at this higher temperature, but stable intergranular liquid films are observed to form first at triple junctions and later at grain boundaries. The composition triangle shows how, when the temperature is increased, the composition at the interfaces is attracted toward the center of the triangle where the metastable portion liquid free energy curve is located. Small grains are observed to dissolve back into the liquid while large grains consume liquid.

http://www.dancogswell.com/research/multiphase/

Category:

Science & Technology

Tags:

• premelting
• grain boundary
• triple junction
• multiphase
• multicomponent
• phase-field
• computer simulation
• eutectic
• solidification

[dac437]

@MrAndreaspower It's software I wrote as part of my PhD thesis.

[MrAndreaspower]

what is that program? pleasee help me