Oxide ceramic composite for high temperature environment...

C - Chemistry – Metallurgy – 04 – B

Patent

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C04B 35/80 (2006.01) C04B 35/76 (2006.01)

Patent

CA 2240417

An oxide ceramic composite suitable for fabricating components of combustion turbines and similar high temperature environments. The composite is fabricated by dispersing metal particles in a fiber preform and infiltrating the fiber preform with sol-gel matrix precursor material. Alternatively, the metal particles are mixed into the sol-gel matrix precursor material and the preform is infiltrated with the mixture. Later in the fabrication process, the metal particles oxidize and become oxidized metal when the sol-gel matrix precursor material is sintered. The oxidized metal has more volume and mass than the metal particles. As a result, the oxidized metal contributes to increasing the density of the composite so that it is suitable for use in combustion turbines and similar high temperature environments.

L'invention concerne un composite de céramique d'oxydes pour fabriquer les composants similaires exposés à des températures élevées. Le composite est fabriqué en dispersant des particules métalliques dans une préforme de fibres et en infiltrant la préforme du fibres avec un précurseur sol-gel de matrice. On peut également mélanger des particules sol-gel de matrice et, infiltrer la préforme ave le mélange. Ensuite, dans le processus de fabrication, les particules métalliques s'oxydent en métal oxyde quand le précurseur sol-gel de matrice est fritté. Le métal oxydé a davantage de volume et de masse que les particules métalliques. Dans ces conditions, le métal oxydé contribue à l'augmentation de la densité du composite. Ce composite est particulièrement bien adapté à une utilisation dans les turbines à combustion et dans des environnements haute température similaires.

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