Manufacturing of ceramic matrix composite using a hybrid process combining TiSi2 active filler infiltration and preceramic impregnation and pyrolysis

Laurence Maillé (1) , Simon Le Ber (1) , Marie-Anne A Dourges (1) , René Pailler (1) , Alain Guette (1) , Jérôme Roger (1)

1 LCTS - Laboratoire des Composites Thermostructuraux

The manufacturing of silicon carbide reinforced ceramic matrix composites by a hybrid process is explored. Fibre preforms are infiltrated with TiSi 2 powders using the slurry method. Using TiSi 2 active filler leads to reduce the porosity by the subsequent formation of nitride phases after treatment under N 2 atmosphere at low temperatures (≤ 1100°C). Taking into account the influence of the specific surface area of the powder on the nitridation rate, it is shown that it is possible to produce nitrides TiN and Si 3 N 4 at 1100°C with an interesting volume expansion inside the composite. To complete the densification of the composite, a polymer impregnation and pyrolysis (PIP) process are performed with a liquid polymeric precursor. Characterizations of the composites show that mechanical properties are improved with the presence of the TiN and Si 3 N 4 phases, and the number of PIP cycles.

Mots clés: nitridation; flexural strength; slurry impregnation; active filler; CMC

Domaines: Matériaux

Laurence Maillé, Simon Le Ber, Marie-Anne A Dourges, René Pailler, Alain Guette, et al.. Manufacturing of ceramic matrix composite using a hybrid process combining TiSi2 active filler infiltration and preceramic impregnation and pyrolysis. Journal of the European Ceramic Society, 2014, 34 (2), pp.189-195. ⟨10.1016/j.jeurceramsoc.2013.08.031⟩. ⟨hal-01844660⟩