Comparison of Two Processes for Manufacturing Ceramic Matrix Composites from Organometallic Precursors |
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| Affiliation: | 1. Department of Earth, Ocean and Atmospheric Sciences, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada;2. Earth Sciences Department, University of Torino, Via Valperga Caluso, 35, 10125 Torino, Italy;1. Université Libre de Bruxelles, 4MAT Department, CP165/63, Avenue F. Roosevelt 50, B-1050 Brussels, Belgium;2. Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC), Sorbonne Universités, UPMC Univ Paris 06, CNRS UMR 7590, Muséum national d''Histoire naturelle, IRD UMR 206, 4 place Jussieu, F-75005 Paris, France;3. AGC Glass Europe, Technovation Centre, Rue Louis Blériot 12, B-6041 Gosselies, Belgium;4. Synchrotron SOLEIL, L''Orme des Merisiers 48, St Aubin, 91192 Gif-sur-Yvette Cedex, France;1. CNRS, CEMHTI UPR 3079, Université d''Orléans, F-45071 Orléans, France;2. Université d''Orléans, Faculté des Sciences, Avenue du Parc Floral, BP 6749, 45067 Orléans Cedex 2, France;3. CEA/DEN/DTN/SMTA/LMCT, Site de Cadarache, 13108 St-Paul lez Durance, France |
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| Abstract: | A commercial polysilazane is used as a silicon carbonitride matrix precursor for the manufacture of ceramic matrix composites using bi-directional SiC Nicalon fabrics as reinforcing material. The objective is to develop a simple and fast process leading to materials able to compete with SiC/C/SiC composites obtained by the Chemical Vapour Infiltration (CVI) route. Two processes are investigated: (1) a ‘conventional’ process using the densification of a SiC fibre preform by several cycles of impregnation of the preform with the polymer followed by pyrolysis and (2) a ‘modified’ process consisting in a powder filling of the fibre preform prior to the precursor impregnation and pyrolysis. This paper describes the different steps of both processes. The materials obtained are characterised in terms of their porosity, microstructure and mechanical properties. © |
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