Method for enhancing the mechanical strength of an SiC/SiC ceramic matrix composite material

US9321696B2 · kind B2 · utility

Assignees

• COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR
• CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE · FR

Inventors

• Emilien Buet · Massy, FR
• Cédric Sauder · Rambouillet, FR
• Sylvie Poissonnet · Igny, FR
• Cathie Vix-Guterl · Riedisheim, FR

Key dates

• Filing date: Dec 21, 2012
• Grant date: Apr 26, 2016
• Expiry date: Dec 21, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/963
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to a method for improving the mechanical strength of a ceramic matrix composite material of the SiC/SiC type, this composite material being obtained by (a) forming a fiber preform from 3rd generation silicon carbide fibers and (b) forming a ceramic matrix around the fiber preform, this ceramic matrix comprising silicon carbide. The method comprises a chemical etching treatment of the surface of the fibers by bringing said fibers into contact with a solution comprising an oxidizer, this treatment being carried out before step (a) or between steps (a) and (b).