Artículo
Amorphous precursors of crystallization during spinodal decomposition
Fecha de publicación:
02/2011
Editorial:
American Physical Society
Revista:
Physical Review E: Statistical, Nonlinear and Soft Matter Physics
ISSN:
1539-3755
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
A general Landau's free energy functional is used to study the dynamics of crystallization during liquid-solid spinodal decomposition (SD). The strong length scale selectivity imposed during the early stage of SD induces the appearance of small precursors for crystallization with icosahedral order. These precursors grow in densely packed clusters of tetrahedra through the addition of new particles. As the average size of the amorphous nuclei becomes large enough to reduce geometric frustration, crystalline particles with a body-centered cubic symmetry heterogeneously nucleate on the growing clusters. The volume fraction of the crystalline phase is strongly dependent on the depth of quench. At deep quenches, the SD mechanism produces amorphous structures arranged in dense polytetrahedral aggregates. © 2011 American Physical Society.
Palabras clave:
Polimeros
,
Phase Transitions
,
Block Copolymer
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Articulos(IFISUR)
Articulos de INSTITUTO DE FISICA DEL SUR
Articulos de INSTITUTO DE FISICA DEL SUR
Citación
Gomez, Leopoldo Raimundo; Vega, Daniel Alberto; Amorphous precursors of crystallization during spinodal decomposition; American Physical Society; Physical Review E: Statistical, Nonlinear and Soft Matter Physics; 83; 2; 2-2011; 215011-215015
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