A METHOD OF FABRICATING A CERAMIC MATRIX COMPOSITE MATERIAL PART, AND A PART OBTAINED THEREBY

摘要

An interphase coating is formed by chemical vaporinfiltration (CVI) on the fibers constituting a fiberpreform, the interphase coating comprising at least aninner layer in contact with the fibers for embrittlementrelief to the composite material, and an outer layer forbonding with the ceramic matrix. The fiber preform isthen kept in its shape by the fibers provided with theinterphase coating and is consolidated by beingimpregnated with a liquid composition containing aceramic precursor, and by transforming the precursor intoa ceramic matrix consolidation phase. The consolidatedpreform is then densified by an additional ceramic matrixphase. No support tooling is needed for forming theinterphase coating by CVI or for densification afterconsolidation using the liquid technique.