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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.)

Sintering and rounding kinetics of irregular glass particles

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Autor(es):
Reis, Raphael M. C. V. [1] ; Barbosa, Anne J. [2] ; Ghussn, Luciana [3] ; Ferreira, Eduardo B. [4] ; Prado, Miguel O. [5] ; Zanotto, Edgar D. [2]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Fluminense Fed Univ UFF, Dept Met & Mat Engn VMT, Volta Redonda - Brazil
[2] Fed Univ Sao Carlos UFSCar, Dept Mat Engn DEMa, Vitreous Mat Lab LaMaV, Sao Carlos, SP - Brazil
[3] Rio De Janeiro State Univ UERJ, Dept Mech & Energy, Resende - Brazil
[4] Univ Sao Paulo, Sao Carlos Engn Sch EESC, Dept Mat Engn SMM, Sao Carlos, SP - Brazil
[5] Comis Nacl Energia Atom, San Carlos De Bariloche, Rio Negro - Argentina
Número total de Afiliações: 5
Tipo de documento: Artigo Científico
Fonte: Journal of the American Ceramic Society; v. 102, n. 2, SI, p. 845-854, FEB 2019.
Citações Web of Science: 1
Resumo

Compacts of irregular glass particles sinter up to five times faster than spherical-particle compacts of the same composition. This effect has been attributed to the sharp edges of irregular particles. In this article, we propose and test a phenomenological model for the sintering kinetics of jagged glass particles considering their rounding during sintering. We assume that the small radii of curvature of the particle edges increase as the particles round off and control the sintering rate. We tested the model by measuring the sintering shrinkage of spherical and irregular particle compacts of a diopside (MgO center dot CaO center dot 2SiO(2)) glass and using literature sintering data for particles of different shapes of a soda-lime-silica glass. The sintering rate of irregular-particle compacts is initially much higher but tends to reach that of their spherical counterparts as they round off. Our model describes the experimental shrinkage of both glasses and explains the shrinkage anisotropy of irregular-particle compacts in the initial stages of sintering, providing a significant step toward the understanding and description of the sintering kinetics of jagged glass particles. (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