Multilayered BN Coatings Processed by a Continuous LPCVD Treatment onto Hi-Nicalon Fibers
Résumé
Boron nitride coatings were deposited onto SiC fibres by means of a continuous low pressure chemical vapour deposition (LPCVD) treatment from BF3 /NH3 mixtures. This process lies in unrolling the fibre in the reactor axis. The relationships between the processing parameters and the structure of the BN deposits are presented. Thanks to a temperature gradient present in the reactor, multilayered BN films can be performed by stacking successive isotropic and anisotropic sublayers. Tensile tests show that, when the temperature profile is well-adapted, the SiC fibres are not damaged by the LPCVD treatment.
Domaines
Matériaux
Fichier principal
Preprint - Jacques - BN continuous LPCVD - JSSC - 2001 (1).pdf (3.25 Mo)
Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)