People | Locations | Statistics |
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Ferrari, A. |
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Schimpf, Christian |
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Dunser, M. |
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Thomas, Eric |
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Gecse, Zoltan |
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Tsrunchev, Peter |
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Della Ricca, Giuseppe |
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Cios, Grzegorz |
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Hohlmann, Marcus |
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Dudarev, A. |
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Mascagna, V. |
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Santimaria, Marco |
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Poudyal, Nabin |
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Piozzi, Antonella |
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Mørtsell, Eva Anne |
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Jin, S. |
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Noel, Cédric |
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Fino, Paolo |
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Mailley, Pascal |
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Meyer, Ernst |
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Zhang, Qi |
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Pfattner, Raphael | Brussels |
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Kooi, Bart J. |
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Babuji, Adara |
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Pauporte, Thierry |
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Reinsch, Stefan
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2023Influence of Mo and B additions in intermetallic near-Fe3Al alloys on microstructure and mechanical properties
- 2023Hydrogen Permeability of Tectosilicate Glasses for Tank Barrier Liners
- 2022Microstructure evolution in Inconel 718 produced by powder bed fusion additive manufacturingcitations
- 2021Foaming Species and Trapping Mechanisms in Barium Silicate Glass Sealantscitations
- 2020Hydrogen Permeation Through Glasscitations
- 2019Analytical toolset to characterize polyurethanes after exposure to artificial weathering under systematically varied moisture conditionscitations
- 2019Density, elastic constants and indentation hardness of hydrous soda-lime silica glassescitations
- 2019Surface crystallization and gas bubble formation during conventional heat treatment in Na2MnP2O7 glasscitations
- 2016Sintering and foaming of barium silicate glass powder compactscitations
- 2016Water, the other network modifier in borate glassescitations
Places of action
article
Sintering and foaming of barium silicate glass powder compacts
Abstract
The manufacture of sintered glasses and glass-ceramics, glass matrix composites, and glass-bounded ceramics or pastes is often affected by gas bubble formation. Against this background, we studied sintering and foaming of barium silicate glass powders used as SOFC sealants using different powder milling procedures. Sintering was measured by means of heating microscopy backed up by XPD, differential thermal analysis, vacuum hot extraction (VHE), and optical and electron microscopy. Foaming increased significantly as milling progressed. For moderately milled glass powders, subsequent storage in air could also promote foaming. Although the powder compacts were uniaxially pressed and sintered in air, the milling atmosphere significantly affected foaming. The strength of this effect increased in the order Ar ≈ N2 < air < CO2. Conformingly, VHE studies revealed that the pores of foamed samples predominantly encapsulated CO2, even for powders milled in Ar and N2. Results of this study thus indicate that foaming is caused by carbonaceous species trapped on the glass powder surface. Foaming could be substantially reduced by milling in water and 10 wt% HCl.