Elaboration en Continu d’un Depot Mince de Carbure Refractaire en Surface des Fibres de Carbone: Caracterisation de la Fibre C/SiC

Autor: H. Mourichoux, C. Vincent, H. Vincent, J. Bouix, J. L. Ponthenier
Rok vydání: 1989
Předmět:
Zdroj: Developments in the Science and Technology of Composite Materials ISBN: 9789401069977
DOI: 10.1007/978-94-009-1123-9_35
Popis: Reactive chemical vapour deposition (RCVD) has been used for the coating of the single filaments of a PAN-based carbon yarn by SiC. A continuous process has been developped, it consists to react a mixture SiCl4-H2 with the fiber, at T 1000°C, under, atmospheric pressure. By the aid of thermodynamic calculations and experimentation, the conditions of RCVD (gaz composition, temperature, reaction time) are optimized to elabore a coating without degrading the fiber. It is shown that a SiC-β coating, 0.05 micron thick, modified slighty the characteristics and is sufficient to reduce the rate of combustion of the fibers by a factor closed to 100.
Databáze: OpenAIRE
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