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Sintering polydispersed spherical glass particles

Published online by Cambridge University Press:  31 January 2011

Miguel O. Prado ,
Edgar D. Zanotto  and
Catia Fredericci
Miguel O. Prado
Affiliation:
Vitreous Materials Laboratory, Department of Materials Engineering, Federal University of São Carlos, C.P. 676, CEP 13.565–905-; São Carlos, SP, Brazil
Edgar D. Zanotto
Affiliation:
Vitreous Materials Laboratory, Department of Materials Engineering, Federal University of São Carlos, C.P. 676, CEP 13.565–905-; São Carlos, SP, Brazil
Catia Fredericci
Affiliation:
Vitreous Materials Laboratory, Department of Materials Engineering, Federal University of São Carlos, C.P. 676, CEP 13.565–905-; São Carlos, SP, Brazil
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Abstract

We used the Clusters model to study the densification kinetics and resulting porosity of a compact of polydispersed soda-;lime-;silica glass spheres. In addition to the physical data (viscosity, surface tension, particle size distribution) required by the Clusters model, for the first time in glass-;sintering studies, we took extra variables into account: the average number of necks per sphere, the effects of pre-;existing crystals on the particle surfaces, and sample size. The model predicted both the densification kinetics and the resulting pore-;size distribution of sintered compacts. A cross section of a porous sample displayed a porosity pattern that agreed with computer-;simulated cross sections, whose pore-;size distributions was calculated via the Clusters model using a Monte Carlo technique. Its capacity to predict both density and pore-;size distribution makes the Clusters model a valuable tool for designing sintered glasses with any desired microstructure.

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Type
Articles
Information
Journal of Materials Research , Volume 18 , Issue 6 , June 2003 , pp. 1347 - 1354
Copyright
Copyright © Materials Research Society 2003

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References

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