Process for the manufacture of a fibrous preform formed of refractory fibers for producing a composite material article
AssigneeSociete Europeenne de Propulsion
InventorsPierre Olry, Dominique Coupe, Philippe DuPont
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Abstract
A process for the manufacture of a fibrous texture for producing a composite material article. The fibrous texture is formed of a yarn comprising discontinuous fibers which are made of a refractory material or a precursor thereof. The discontinuous fibers are disposed parallel to one another, without twist. A covering yarn made of a fugitive material is disposed over the discontinuous fibers to provide integrity to the yarn. The covering yarn is eliminated after formation of the fibrous texture.
Claims33
A process for the manufacture of a fibrous preform formed of refractory fibers for producing a composite material article, said process comprising the steps of:
- providing a yarn comprising discontinuous fibers made of one of a refractory material or a precursor of said refractory material, said discontinuous fibers being disposed parallel to one another without twist, and a covering yarn made of a fugitive material over said discontinuous fibers to provide integrity to said yarn;
- forming a fibrous texture by weaving said yarn composed of parallel discontinuous fibers and a covering yarn;
- and
- eliminating said covering yarn, to allow said discontinuous fibers to loosen with the bulk of said fibrous texture.
A process for the manufacture of a fibrous preform formed of refractory fibers for producing a composite material article, said process comprising the steps of:
- providing a yarn comprising discontinuous fibers made of one of a refractory material or a precursor of said refractory material, said discontinuous fibers being disposed parallel to one another without twist, and a covering yarn made of a fugitive material over said discontinuous fibers to provide integrity to said yarn;
- forming a two-dimensional fibrous texture by weaving said yarn composed of parallel discontinuous fibers and said covering yarn;
- eliminating said covering yarn to allow said discontinuous fibers to loosen within the bulk of said fibrous texture;
- and
- superposing and needling a plurality of plies of said two-dimensional fibrous texture to obtain a preform of a composite material article.
A process for the manufacture of a fibrous preform formed of refractory fibers for producing a composite material article, said process comprising the steps of:
- providing a yarn comprising discontinuous fibers made of one of a refractory material or a precursor of said refractory material, said discontinuous fibers being disposed parallel to one another without twist, and a covering yarn made of a fugitive material over said discontinuous fibers to provide integrity to said yarn;
- forming one-directional sheets from said yarn composed of parallel discontinuous fibers and said covering yarn;
- superposing a plurality of said one-directional sheets so that discontinuous fibers of adjacent sheets are not parallel to each other;
- needling together said plurality of superposed one-directional sheets;
- and
- eliminating said covering yarn.
A process for the manufacture of a fibrous preform formed of refractory fibers for producing a composite material article, said process comprising the steps of:
- providing a yarn comprising discontinuous fibers made of one of a refractory material or a precursor of said refractory material, said discontinuous fibers being disposed parallel to one another without twist, and a covering yarn made of a fugitive material over said discontinuous fibers to provide integrity to said yarn;
- forming one-directional sheets from said yarn composed of parallel discontinuous fibers and said covering yarn;
- superposing a plurality of said one-directional sheets so that discontinuous fibers of adjacent sheets are not parallel to each other;
- pre-needling said plurality of superposed one-directional sheets to form a basic fabric;
- needling together a plurality of plies of said basic fabric to obtain a preform of a composite material article;
- and
- eliminating said covering yarn.
Dependencies are inferred from the claim text.