High-speed synchrotron X-ray imaging of glass foaming and thermal conductivity simulation
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
Glass foams are attractive thermal insulation materials, thus, the thermal conductivity (λ) is crucial for their insulating performance. Understanding the foaming process is critical for process optimization. Here, we applied high-speed synchrotron X-ray tomography to investigate the change in pore structure during the foaming process, quantifying the foam structures and porosity dynamically. The results can provide guidance for the manufacturing of glass foams. The 3D pore structures were also used to computationally determine λ of glass foams using image-based modelling. We then used the simulated λ to develop a new analytical model to predict the porosity dependence of λ. The λ values of the glass foams when the porosity is within 40% to 95% predicted by the new model are in excellent agreement with the experimental data collected from the literature, with an average error of only 0.7%, which performs better than previously proposed models.
Date Issued
2020-05
Date Acceptance
2020-02-26
Citation
Acta Materialia, 2020, 189, pp.85-92
ISSN
1359-6454
Publisher
Elsevier BV
Start Page
85
End Page
92
Journal / Book Title
Acta Materialia
Volume
189
Copyright Statement
© 2020 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/
Identifier
https://www.sciencedirect.com/science/article/pii/S1359645420301737?via%3Dihub
Subjects
Materials
0204 Condensed Matter Physics
0912 Materials Engineering
0913 Mechanical Engineering
Publication Status
Published
Date Publish Online
2020-03-01