Method of forming stabilized plasma-sprayed thermal barrier...

Details Method of forming stabilized plasma-sprayed thermal barrier... Method of forming stabilized plasma-sprayed thermal barrier...

C - Chemistry, Metallurgy

23

C

C23C 4/18 (2006.01) C23C 4/12 (2006.01) F01D 5/28 (2006.01)

Patent

CA 2581985

A method for stabilizing a porous thermal barrier coating (16) plasma sprayed on a substrate (10) comprises the steps of immersing the porous thermal barrier coating (16) in a sol gel comprising a metal oxide or precursor thereof, a solvent, and a surfactant, applying vacuum pressure to the sol gel to infiltrate the porous thermal barrier coating (16) with the sol gel, and drying the sol gel to produce residual metal oxide particles (18) in the porous thermal barrier coating (16).

La présente invention a trait à un procédé pour la stabilisation de revêtement de barrière thermique poreux (16) projeté par plasma sur un substrat (10) comprenant les étapes suivantes: l'immersion du revêtement de barrière thermique poreux (16) dans un sol-gel comportant un oxyde métallique ou un précurseur de celui-ci, un solvant, et un agent tensioactif, l'application d'une pression sous vide au sol-gel pour l'infiltration du revêtement de barrière thermique poreux (16) par le sol-gel, et le séchage du sol-gel pour produire des particules d'oxyde métallique résiduelles (18) dans le revêtement de barrière thermique poreux (16).

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