EL MANSOURI, Amine; GUETTE, Alain; BERTRAND, Nathalie; VIGNOLES, Gerard

doi:10.1016/j.cej.2023.143544

Metadatos

Mostrar el registro completo del ítem

Licencia de uso del documento

EL MANSOURI, Amine

Laboratoire des Composites Thermostructuraux [LCTS]

GUETTE, Alain
Laboratoire des Composites Thermostructuraux [LCTS]

BERTRAND, Nathalie

Laboratoire des Composites Thermostructuraux [LCTS]

Idioma

Article de revue

Este ítem está publicado en

Chemical Engineering Journal. 2023-07-15, vol. 468, p. 143544

Resumen en inglés

SiC powders coated by pyrocarbon are a promising feedstock for the synthesis of Ceramic-matrix composites. Preparing such powders is possible using low pressure Fluidized-Bed Chemical Vapor Deposition (FB-CVD) with propane as a precursor at 1000 °C. A preliminary study on non-porous and porous alumina powders as substrates has been carried out. With the help of a numerical assessment of heat transfer in the reactor, it has been possible to optimize the setup and achieve excellent deposition yields (up to 100%), even inside very small pores (7 nm), and transpose the protocol to 200-nm diameter SiC powders. The microstructure and texture of the deposits were characterized by TEM, showing dependence to pore size due to a texture-induction effect by the substrate surface. A quantitative assessment of mass transfer indicated that the results obtained here agree with past studies on FB-CVD of other materials and on pyrocarbon CVD on flat substrates.< Leer menos

Palabras clave en inglés

Fluidized Bed

Chemical Vapor deposition

pyrocarbon

heat and mass transfer

microstructure

reaction kinetics

Metadatos

Compartir este ítem

Licencia de uso del documento

Fluidized Bed Chemical Vapor Deposition of pyrocarbon on various types of powders: heat and mass transfer analyses and nanotexture characterization

Idioma

Este ítem está publicado en

Resumen en inglés

Palabras clave en inglés

URI

DOI

Centros de investigación