METODO PER REALIZZARE UN RIVESTIMENTO PASSIVANTE A BASE DI UNO O PIÙ COMPOSTI DEL SILICIO SU UN COMPOSITO A MATRICE CERAMICA RINFORZATO CON FIBRE DI CARBONIO E COMPOSITO A MATRICE CERAMICA RINFORZATO CON FIBRE DI CARBONIO CON TALE RIVESTIMENTO

A method makes a silicon compound-based passivating coating on a ceramic matrix composite reinforced with carbon fibers. A piece made in a ceramic matrix composite reinforced with carbon fibers is placed in a closed chamber of an oven. A predefined load of solid silicon is placed in the chamber avoiding direct contact between the silicon and the piece. The oven is heated while maintaining inside the chamber predefined medium/low vacuum conditions, to generate silicon vapors inside the chamber. The vapors react with substances on the surface of the piece to form a surface coating having composites of the substances with the silicon. The partial pressure of the vacuum, temperature inside the chamber and exposure times of the piece to the silicon vapors to obtain a predefined thickness of the surface coating are chosen. The piece is cooled once the predefined thickness of the passivating coating is reached.