Impregnated ceramic foam made of recrystallized silicon carbide
AssigneeSaint-Gobain Centre De Recherches Et D'Etudes Europeen
InventorsChristian Claude His, Franceline Villermaux, Nicolas Raffin, Michel Dussaulx
Life of this patent
Estimating the term…
Abstract
Porous ceramic part comprising a porous ceramic foam having a total porosity of between 50 and 92% and an intergranular porosity of at least 5%, walls of at least some of the cells of the ceramic foam being at least partly covered with an impregnation material. The invention relates in particular to a recrystallized silicon carbide foam impregnated with silicon.
Claims27
A porous ceramic part comprising a porous ceramic foam having cells and presenting a total porosity of between 50 and 92%, the total porosity being the sum of an interconnection porosity, defined by “cellular pores”, and of an intergranular porosity, defined by “intergranular pores”, walls of at least some of the cells of the ceramic foam defining said intergranular porosity being at least partly impregnated with an impregnation material, said ceramic foam having an intergranular porosity of at least 5% before said impregnation.
A method for manufacturing a porous ceramic part comprising an impregnation, by means of an impregnation material, of at least a part of the walls of cells of a ceramic foam having a total porosity of between 50 and 92%, the total porosity being the sum of an interconnection porosity, defined by “cellular pores”, and of an intergranular porosity, defined by “intergranular pores”, the walls of at least some of the cells of the ceramic foam defining said intergranular porosity, said ceramic foam having an intergranular porosity of at least 5%.
Dependencies are inferred from the claim text.