HIGH-TEMPERATURE COMPOSITE MATERIALS WITH CARBON OR CARBON-COATED FIBRE REINFORCEMENTS AND ENHANCED OXIDATION RESISTANCE

摘要

A composite material with a matrix produced by sequenced chemical vapour infiltration within a fibrous reinforcement. Each basic matrix sequence includes a relatively flexible layer and a relatively rigid ceramic layer and has a thickness that increases away from the reinforcement fibres. The thickness of at least the first sequence to be deposited is small enough to enable essentially individual sheathing of the fibres. The flexible layers are made of an anisotropic material having sufficient shear and transverse resiliency, and the thickness of the flexible layers is large enough to maintain the mainly ceramic nature of the matrix while absorbing the differential expansion of the components of the composite material during the production thereof, without giving rise to an initial cracking network.