PROCESS FOR THE MANUFACTURE OF A FIBROUS PREFORM FORMED OF REFRACTORY FIBERS FOR PRODUCING A COMPOSITE MATERIAL ARTICLE

摘要

A fibrous preform is formed from a yarn composed of long discontinuous fibers made of a refractory material or its precursor. The discontinuous fibers are disposed parallel to one another without twist, and the integrity of the yarn is achieved by a covering yarn made of a fugitive material. The fibrous preform is intended to be densified by a matrix material for the manufacture of a composite material article. The covering yarn is eliminated before the preform is densified by the matrix material.