METHOD OF MAKING ARTICLES FROM CARBON-SILICON CARBIDE MATERIAL Russian patent published in 2012 - IPC C04B35/573 C04B35/577 

FIELD: chemistry.

SUBSTANCE: invention relates to structural materials operating in conditions of high thermal load and oxidative medium and can be used in chemical, petrochemical and chemical-metallurgical industries, as well as aircraft engineering to make articles and components of structures exposed to aggressive media. The method involves making a workpiece from porous carbon-graphite material, forming a slurry coating thereon based on a composition of silicon nitride and a temporary binder, heating the coated workpiece in a vacuum or at atmospheric pressure in argon to temperature 1800-1900°C and holding in said temperature interval for 1-2 hours. Heating, holding and cooling the workpiece is carried out in the closed volume of a reactor in silicon vapour. In one of the preferable versions of the method, heating of the workpiece with the slurry coating to 1700-1750°C is carried out in silicon vapour at reactor pressure 400-760 mm Hg, and from 1700-1750°C to 1800-1900°C at reactor pressure 1-36 mm Hg.

EFFECT: simple method of making articles from carbon-silicon carbide material while reducing open porosity thereof and maintaining sufficiently uniform distribution of SiC and free silicon in volume thereof.

7 cl, 1 tbl