Abstract
Peculiarities of fabrication of ceramic porous and dense composite materials based on compounds of the Si–C–O–N system with the participation of chemical reactions and formation of new phases are discussed. An attempt to analyze the relatively new technologies in terms developed in earlier works on reaction sintering of silicon nitride, carbide, and oxynitride is undertaken. It is shown that the approach to reaction sintering, which includes the selection of promising reaction systems allowing for bulk effect of reactions occurring in the course of material fabrication can be extended to the case of obtaining porous and highly porous materials. In contrast to the case of fabrication of reaction dense materials, where systems with positive bulk effects are used, the reaction systems with negative bulk effects can be used when fabricating highly porous materials.
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