METHOD AND INSTALLATION FOR DENSIFYING POROUS SUBSTRATE BY GAS-PHASE CHEMICAL INFILTRATION

摘要

The invention concerns a method which consists in loading the substrates to be densified in a loading zone of a furnace and heating it in the furnace so as to bring it to a temperature at which the desired matrix material is formed from the precursor gas(es) contained in a reactive gas supplied at one end of the furnace. After feeding the reactive gas into the furnace, heating the reactive gas by passing it in a gas heating zone located upstream of the loading zone, in the circulating direction of the reactive gas in the furnace. The invention is characterized in that the reactive gas is pre-heated before being fed into the furnace to be brought, when it is fed into the furnace, at a temperature intermediate between room temperature and the temperature for heating the substrates.