METHOD FOR OBTAINING A POROUS STRUCTURE BASED ON SILICON CARBIDE AND OBTAINED POROUS STRUCTURE

摘要

The invention relates to a process for obtaining a structure made from a porous ceramic material comprising at least 95% of silicon carbide SiC, said process being characterized in that said structure is obtained from a mixture of SiC grains comprising at least: a first fraction of α-SiC grains whose median diameter is less than 5 microns; a second fraction of α-SiC grains whose median diameter is at least two times greater than that of the first fraction of α-SiC grains and whose median diameter is greater than or equal to 5 microns; and a fraction of &bgr;-SiC grains or of at least a precursor of &bgr;-SiC grains. The invention also relates to the porous structure obtained according to the process.