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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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Dusserre, Gilles
IMT Mines Albi
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2023A numerical method to simulate the intra-tows mechanical behaviour of oxide/oxide CMCs: coupling of a lattice with a FE continuum
- 2021Enabling pseudo-ductility in geopolymer based glass-ceramics matrix composites by slurry dilutioncitations
- 2021Mechanical behavior of a NextelTM 610/alumina-silica, oxide/oxide ceramic matrix composite
- 2019Formulation of oxide suspensions for liquid processing of ceramic matrix composites
- 2019EVOLUTION OF THE RHEOLOGICAL BEHAVIOUR OF AN AQUEOUS SUSPENSION OF GEOPOLYMERIC PRECURSORS DURING AGEING
- 2019Influence of temperature cycles on strength and microstructure of spray-deposited Si-Al CE9F alloycitations
- 2019Nanocomposites, nanofilled matrices composites: manufacturing conditions and properties
- 2018Modelling the shape of an adhesive joint during assembly ; Modélisation de la forme d'un joint d'adhésif pendant l'assemblage
- 2018Modelling the shape of an adhesive joint during assembly
- 2017A uniaxial cyclic compression method for characterizing the rheological and textural behaviors of mechanically dewatered sewage sludgecitations
- 2016Probabilistic rupture analysis of a brittle spray deposited Si–Al alloy under thermal gradient: Characterization and thermoelastic sizing guidelinescitations
- 2016Cure kinetics of a polysilazane system: Experimental characterization and numerical modellingcitations
- 2016Cure kinetics of a polysilazane system: Experimental characterization and numerical modellingcitations
- 2012Processing glass-ceramic matrix composites by liquid moulding: characterization of the rheology of a resin derived from a geopolymeric system
- 2012Processing glass-ceramic matrix composites by liquid moulding : characterisation of the rheology of a resin derived from a geopolymeric system
- 2011Evaluation of viscous and elastic parameters of a borosilicate glass above transition temperature using optical instrumented squeeze testscitations
- 2011Mold Filling Simulation of Resin Transfer Molding Combining BEM and Level Set Methodcitations
- 2010Mold filling simulation of resin transfer molding combining BEM and level set method
- 2010Numerical simulation of resin transfer molding using BEM and level set methodcitations
- 2009In-situ determination of the heat flux density at the glass/mould interface during a glass pressing production cyclecitations
- 2009Recent patents on in-plane permeability measurement of LCM composite reinforcementscitations
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document
Formulation of oxide suspensions for liquid processing of ceramic matrix composites
Abstract
This study deals with the formulation of oxide suspensions for liquid processing of ceramic matrix composites. Those processes are more advantageous than conventional ones regarding: cycle time, quality, flexibility and cost. To properly impregnate the fiber reinforcement, the suspension must be stable, well dispersed and have a low viscosity (< 1 Pa.s). Regarding those requirements, the dispersion of an alpha-alumina ultrafine powder (AKP50, d50 = 0.3 µm, Sumitomo Chemical) in aqueous suspension, using an ammonium polymethacrylate (Darvan® C-N, Vanderbilt Minerals) as dispersant, was investigated by zeta potential, sedimentation and rheological measurements. The dispersant concentration minimizing the viscosity was found to be 0.26 wt.%. Moreover, this concentration permits to shift the isoelectric point (IEP) from pH = 9.5 (without dispersant) to pH = 5.1. The influence of powder concentration on suspension viscosity is well described by a Quemada model. The maximum volume fraction was found to be equal to 40.16 vol.%, thanks to the viscosity. No significant sedimentation was observed, regarding the operating time of the process. This work comprises also the study of a commercial suspension of colloidal silica (Ludox AS-40, 40 wt.% suspension in water, W.R. Grace & Co.-Conn.). The zeta potential is negative from pH = 2 to pH = 11. The impact of dilution on viscosity was studied. For all powder loadings (from 1 to 40 wt.%), the viscosity is lower than 1 Pa.s (Newtonian) and the variation is also well described by a Quemada model. No sedimentation was observed. Furthermore, the mixture of both suspensions in a stoichiometric ratio of 3Al2O3-2SiO2, corresponding to mullite, was investigated. The natural pH and the IEP were measured at pH = 9.5 and pH = 3.0, respectively. The viscosity, as a function of solid concentration, is well described by a Quemada model. No significant sedimentation was observed.