METHOD OF IMPREGNATING HOLLOW ARTICLES OF POROUS MATERIAL CONTAINING SILICON CARBIDE AND/OR CARBON WITH SILICON AND DEVICE FOR EFFECTING THE SAME

摘要

FIELD: production of refractory articles. SUBSTANCE: method involves the steps of: applying silicon melt supplied through a member with capillary structure at temperature of an article to be impregnated of 1260-1400 degrees C and a temperature of the melt of 1430-1700 degrees C and keeping the article, cooling at axial temperature gradient in the article of 25-60 degrees C/m. Device for impregnating hollow articles with silicon has a hermetically sealed chamber, cylindrical resistive heater, crucible, feeder mounted in the chamber. The feeder is made of material with capillary structure. The device furthermore is provided with a support and shield, the shield thickness being variable in height and determined from the expression given in the invention description. EFFECT: enhanced efficiency. 2 cl, 1 dwg, 1 tbl