CHOLLON, Georges; VALLEROT, Jean-Marie; HELARY, Doriane; JOUANNIGOT, Stephane

doi:10.1016/j.jeurceramsoc.2006.05.038

Laboratoire des Composites Thermostructuraux [LCTS]

VALLEROT, Jean-Marie
Laboratoire des Composites Thermostructuraux [LCTS]

HELARY, Doriane
Laboratoire des Composites Thermostructuraux [LCTS]

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Article de revue

Ce document a été publié dans

Journal of the European Ceramic Society. 2007-01-01, vol. 27, n° 2-3, p. 1503-1511

Résumé en anglais

The structure and microtexture of different SiC based CVD coatings have been studied by RMS, in their as-processed state and after high temperature annealing, creep, indentation and irradiation. Both annealing and creep resulted in the same degree of SiC crystal growth and decrease of stacking faults. A slight influence of stress was however observed on the structure and texture of the co-deposited free-carbon, likely as a consequence of the intergranular creep mechanism. Room temperature indentation induces substantial structural disorders (dislocations, stacking faults, small grains) near the contact and more extended damages due to dislocation slip parallel to the compact Si-C planes. These structural changes were found to depend on the single crystal orientation and therefore, on the texture of * Corresponding author: Tel.: +33 5 56 84 47 27, Fax: +33 5 56 84 12 25, E-mail address: chollon@lcts.u-bordeaux1.fr 2 polycrystalline SiC. Room temperature proton irradiation produced only small amounts of disorders. The specific alterations of the Raman features were explained using a phonon confinement model. This approach supports the existence of very low scale defects, likely as punctual defects.< Réduire

Mots clés en anglais

Defects

Creep

Plasticity

SiC

Raman Spectroscopy

URI

https://oskar-bordeaux.fr/handle/20.500.12278/184504

DOI

http://dx.doi.org/10.1016/j.jeurceramsoc.2006.05.038

Unités de recherche

Laboratoire des Composites Thermo Structuraux (LCTS) - UMR 5801

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Structural and textural changes of CVD-SiC to indentation, high temperature creep and irradiation

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Résumé en anglais

Mots clés en anglais

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DOI

Unités de recherche