| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Débarre, Antoine
Office National d'Études et de Recherches Aérospatiales
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Topics
Publications (5/5 displayed)
- 2024Experimental and numerical study of the mechanical behaviour of an oxide/oxide ceramic-matrix-composite at high temperature ; Étude expérimentale et numérique du comportement mécanique d'une matrice céramique-composite oxyde/oxyde à haute température
- 2024Impact of additives on the quality of oxide/oxide tow-pregs obtained by continuous fibre impregnationcitations
- 2022Nonlinear continuum damage models for ceramic matrix composites with significant in plane ply anisotropy
- 2022Scalar nonlinear continuum damage models for ceramic matrix composites with significant in plane ply anisotropy
- 2021High temperature mechanical behaviour of an alumina/alumina composite
Places of action
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article
Impact of additives on the quality of oxide/oxide tow-pregs obtained by continuous fibre impregnation
Abstract
This paper focuses on the formulation of aqueous alumina slurries compatible with manufacturing alumina/alumina ceramic matrix composite (CMC) by a continuous tow impregnation process. Two hygroscopic organic plasticizers, sorbitol and glycerol, along with a gelling powder, boehmite, are evaluated for their impact on both slurry behaviour and the quality of impregnated tows. The interest of using glycerol instead of sorbitol is demonstrated, as glycerol exhibits smaller impact on slurry viscosity and stability, while being more hygroscopic and plasticizing, enabling a reduction in organic content. Combining glycerol with boehmite powder improves the surface and the tack of impregnated tows, although boehmite increases slurry viscosity and shear-thinning behaviour. Furthermore, thermal degradations of sorbitol and glycerol are studied through thermogravimetric analysis, to define an autoclave curing cycle for each plasticizer removing, to achieve optimal compaction of tow-pregs and hence reduce the porosity of the resulting CMCs.