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Constrained Sintering of a Glass Ceramic Composite: II. Symmetric Laminate

Ollagnier, Jean-Baptiste and Green, David J. and Guillon, Olivier and Rödel, Jürgen (2009):
Constrained Sintering of a Glass Ceramic Composite: II. Symmetric Laminate.
In: Journal of the American Ceramic Society, pp. 2900-2906, 92, (12), ISSN 00027820, [Online-Edition: http://dx.doi.org/10.1111/j.1551-2916.2009.03347.x],
[Article]

Abstract

The sintering behavior of symmetric laminates has been experimentally measured and modeled. Two cases are distinguished: (i) sintering of a viscous layer between viscous substrates and (ii) sintering of a viscous layer between elastic substrates. A simple model based on a persisting isotropic microstructure allowed computation of developing in-plane stresses. These in conjunction with a viscous Poisson's coefficient were taken to predict out-of-plane stresses and finally densification rate. This approach, however, proved unsuccessful to predict the large observed differences in densification rate between laminates constrained by either green or dense alumina substrates. The discrepancy was found to be due to widely different microstructures developing with different degrees of elastic constraint. Pore area and pore and particle orientation were determined to quantify these microstructural changes.

Item Type: Article
Erschienen: 2009
Creators: Ollagnier, Jean-Baptiste and Green, David J. and Guillon, Olivier and Rödel, Jürgen
Title: Constrained Sintering of a Glass Ceramic Composite: II. Symmetric Laminate
Language: English
Abstract:

The sintering behavior of symmetric laminates has been experimentally measured and modeled. Two cases are distinguished: (i) sintering of a viscous layer between viscous substrates and (ii) sintering of a viscous layer between elastic substrates. A simple model based on a persisting isotropic microstructure allowed computation of developing in-plane stresses. These in conjunction with a viscous Poisson's coefficient were taken to predict out-of-plane stresses and finally densification rate. This approach, however, proved unsuccessful to predict the large observed differences in densification rate between laminates constrained by either green or dense alumina substrates. The discrepancy was found to be due to widely different microstructures developing with different degrees of elastic constraint. Pore area and pore and particle orientation were determined to quantify these microstructural changes.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 92
Number: 12
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
Date Deposited: 18 May 2011 15:20
Official URL: http://dx.doi.org/10.1111/j.1551-2916.2009.03347.x
Identification Number: doi:10.1111/j.1551-2916.2009.03347.x
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