PROCESSO PARA A PRODUCAO DE UM CORPO CERAMICO AUTO-SUPORTADO E CORPO CERAMICO ASSIM OBTIDO

摘要

A method of producing self-supporting ceramic bodies (10) having a modified metal-containing component includes first providing a self-supporting ceramic body (10) comprising (i) a polycrystalline oxidation reaction product (12) formed upon oxidation of a molten parent metal precursor with an oxidant, and (ii) an interconnected metal-containing component (14) at least partially accessible from one or more surfaces (15) of said ceramic body (10). The surface or surfaces (15) of the ceramic body (10) is contacted with a quantity of foreign metal different from said interconnected metal-containing component (14) at a temperature and for a time sufficient to allow for interdiffusion, whereby at least a portion of said metal-containing component (14) is displaced by said foreign metal. The resulting ceramic body, having an altered metal-containing component, exhibits modified or improved properties.