| abstract |
The invention relates to a method of manufacturing an anti-oxidation system for porous ceramics on the basis of SiC or Si3N4. By means of infiltration into the pore inner spaces of a sol containing at least one metal component, conversion of the sol to a gel (sol-gel process) and a subsequent high-temperature treatment, it is possible successfully to provide a crystalline anti-oxidation layer, which is resistant to temperatures of up to at least 1650 DEG C. even under cyclic temperature stresses, and reveals a heat expansion behavior adapted to the SiC or Si3N4 over the entire temperature range used. |