Busca avançada
Ano de início
Entree
(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.)

Crystallization of glass-forming liquids: Maxima of nucleation, growth, and overall crystallization rates

Texto completo
Autor(es):
Schmelzer, Juern W. P. [1] ; Abyzov, Alexander S. [2] ; Fokin, Vladimir M. [3, 4] ; Schick, Christoph [1] ; Zanotto, Edgar D. [4]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Rostock, Inst Phys, D-18057 Rostock - Germany
[2] Kharkov Inst Phys & Technol, Natl Sci Ctr, UA-61108 Kharkov - Ukraine
[3] Vavilov State Opt Inst, St Petersburg 193171 - Russia
[4] Univ Fed Sao Carlos, UFSCar, Dept Mat Engn, Vitreous Mat Lab, BR-13565905 Sao Carlos, SP - Brazil
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: Journal of Non-Crystalline Solids; v. 429, p. 24-32, DEC 1 2015.
Citações Web of Science: 35
Resumo

A set of equations for determining the temperatures and magnitudes of the maximum nucleation, growth, and overall crystallization rates of glass-forming liquids is derived and analyzed. The analysis is performed based on the classical theories of nucleation and growth, without introducing additional assumptions such as the Stokes-Einstein-Eyring (SEE) equation, models for specific kinetic mechanisms of aggregation, a specification of the type of temperature dependence of the diffusion coefficient, or specific models for the computation of the driving force of crystallization and the work of critical cluster formation. Such approximations are employed only for analytical estimates and to illustrate the general results. In particular, it is shown that the magnitude of the maximum of the steady-state nucleation rate J(max) decreases upon increasing the ratio T-max((nucl))/T-m (T-max((nucl)): temperature of maximum of the steady-state nucleation rate, T-m: melting or liquidus temperature). Similarly, the maximum growth rate, u(max) decreases with increasing values of the ratio T-max((growth))/T-m (T-max((growth)): temperature of maximum of the growth rate). Several experimental results on the crystallization kinetics of glass-forming liquids are interpreted theoretically for the first time employing the concepts developed here. (C) 2015 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