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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

The effect of heterogeneous structure of glass-forming liquids on crystal nucleation

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Autor(es):
Abyzov, Alexander S. ; Fokin, Vladimir M. ; Yuritsyn, Nikolay S. ; Rodrigues, Alisson Mendes ; Schmelzer, Juern W. P.
Número total de Autores: 5
Tipo de documento: Artigo Científico
Fonte: Journal of Non-Crystalline Solids; v. 462, p. 32-40, APR 15 2017.
Citações Web of Science: 15
Resumo

A model for the description of crystal nucleation is proposed incorporating into classical nucleation theory concepts of spatial heterogeneity of glass-forming liquids. It is assumed that nucleation processes may proceed with detectable rates only in liquid-like (soft) regions and are suppressed in solid-like (rigid) parts. Determining appropriately the fraction of liquid-like solid-like regions in dependence on temperature this approach allows one to achieve a satisfactory agreement between classical nucleation theory and experiment not only at relatively high temperatures but also at temperatures lower than that of the nucleation rate maximum. The model was tested successfully on several silicate glasses revealing homogeneous volume nucleation. Some other phenomena in the interplay of crystallization and glass transition are also discussed giving an independent verification of the validity of our basic assumption. (C) 2017 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 13/07793-6 - CEPIV - Centro de Ensino, Pesquisa e Inovação em Vidros
Beneficiário:Edgar Dutra Zanotto
Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs