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Nucleation and decomposition in a metastable solid solution.

, ,

20x20x20_V=0.4_c=0.9_a=0.5_colorA single nucleation process in 20x20x20/2 atoms computation cell. 60x60x60_V=0.4_c=0.9_a=0.5_colorMultiple nucleation process in a 60x60x60/2 atoms computation cell

Influence of noise on the spinodal decomposition in quasi-1D structure (nanowire)

,

spinodal decomposition in nanowireStarting from homogeneous state with an initial spike in the middle of the sample to start the decomposition.
spinodal decomposition in nanowireStarting from homogeneous state with an initial random noise (amplitude is 0.1, ). spinodal decomposition in nanowireStarting from homogeneous state with an initial random noise (amplitude is 0.5, ).
spinodal decomposition in nanowireStarting from homogeneous state with random (Langevin) noise . spinodal decomposition in nanowireStarting from homogeneous state with random (Langevin) noise .

 

Spinodal decomposition in a cubic cell

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spinodal decompositionStarting from homogeneous state with spike in the center of the cell . spinodal decompositionStarting from homogeneous state with spike in the center of the cell . (half of the cell is shown)
spinodal decompositionStarting from homogeneous state with . (begging of the process) spinodal decompositionStarting from homogeneous state with . (longer and accelerated)

 

Ordering in quasi-1D structure (nanowire)

ordeing in nanowireColor is proportional to the composition.

 

Interface sharpening

(about interface sharpening: SCIENCE, PRL, web)

interface shrapeningColor is proportional to the composition.

 

Visualization of the results by OVITO (http://www.ovito.org).

A. Stukowski,  Visualization and analysis of atomistic simulation data with OVITO - the Open Visualization ToolModelling Simul. Mater. Sci. Eng. 18 (2010), 015012