Commissariat a L'energie Atomique

Office National D'etudes Et De Recherches Aerospatiales

Office National D'etudes Et De Recherche Aerospatiales (onera)

Office National D'etudes Et De Recherche Aerospatiales

Claude Le Pennec

Jean Jamet

Jean-Jacques Poupeau

Jacqueline Omnes

Philippe LePrince

Michel Bejet

Claude Indrigo

Ghislaine Seiberras

Chemical vapor deposition apparatus activated by a microwave plasma

A method for the high temperature, high pressure impregnation of thick woven carbon substrates with pitches to form carbon impregnated carbon bodies. The use of pitch with high (about 30%) levels of free carbon as the impregnating pitch reduces the number of cycles to obtain a product of given density as compared to carbon free pitch. The impregnation is conducted in hydrogen permeable aneroid vessels.

Process for the manufacture of compact composite carbonaceous materials

The present invention relates to a process and device for the accelerated densification of a porous carbonaceous substrate, of the type consisting in decomposing a hydrocarbon substance in the presence of said substrate under high pressure and at high temperature, decomposition being effected inside a closed reactor allowing the elimination of the hydrogen emitted during the reaction as it is produced, the walls of said reactor having the necessary suppleness for the inner volume thereof to be adapted at any instant, under the effect of the pressure applied, to the volume of the liquid phase which it contains, wherein the hydrocarbon substance to be decomposed is chosen from the group comprising pitches, acenaphthylene, phenanthrene or mixtures of these products. The invention also relates to a process for preparing said substance.

Process and device for the accelerated densification of a porous

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Vincennes, France

Claude Le Pennec