MATERIAU COMPOSITE A MATRICE ET FIBRES DE RENFORCEMENT CARBONEES ET SON PROCEDE DE FABRICATION

摘要

Composite material with matrix and reinforcing fibres of carbon and its production process. The composite material according to the invention comprises a substrate (2) of carbon fibres covered with a fine silicon carbide coating (6) and embedded in a carbon matrix (4) containing 2 to 10% by weight silicon carbide, an outer silicon carbide covering (10), followed by a first filling of the cracks with silica (14) and a second filling with borosilicate glass (16) (SiO2-B2O3). This unoxidizable material can in particular be used as a heat shield for a spacecraft.