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