Herakles

Safran Ceramics

Snecma Propulsion Solide

Fasver

Illinois Tool Works Inc.

Centre National De La Recherche Scientifique

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Snecma Moteurs

Safran Nacelles

Centre National Detudes Spatiales

Messier-Bugatti Inc.

Eric Philippe

Eric Bouillon

Laurence Bes

Dominique Coupe

Eric Conete

François Charleux

Aurélia Clerambourg

Nicolas Eberling-Fux

Sébastien Bertrand

René Pailler

Thomas Revel

Maxime François Roger Carlin

Paul Carminati

Bertrand Desjoyeaux

Matthieu Arnaud Gimat

Guilhem Roux

Rene Pailler

Thierry Guy Xavier Tesson

Adrien Delcamp

Michel Laxague

Valérie Chaumat

Franck Lamouroux

Michael James Verrilli

Sylvie Loison

Benoit Carrere

Marie Lefebvre

Eric Lavasserie

Henri Tawil

Aline Planckeel

Francois Trantoul

Philippe Bucci

Rémi Bouvier

Alain Caillaud

Arnaud Fillion

Rémy Dupont

Gildas Garnier

Jean-Michel Guirman

Jean-Christophe Ichard

Jean-Michel Georges

Laurent Baroumes

Benoît Carrere

Medhy Damien Bounia

Sébastien Jimenez

Stéphanie Fouquet

Stephanie Fouquet

Sebastien Jimenez

Francois Charleux

Benjamin Lacombe

Emilie Courcot

Gautier Mecuson

Hervé Plaisantin

Emilie Mendez

Daniel Benethuiliere

Gaël Bouchy

Denis Vicien

Didier Alberny-Sicard

Pascal Ducharlet

Jean-Daniel Lalanne

Marie-Anne Dourges

Dominique Jehl

Andre Lafond

Eddy Goulliane

Stephane Mazerat

Robert Bagat

Anthony Gallo

Stéphane Mazerat

André Lafond

Francis Teyssandier

Bounia Medhy Damien Damien

Jérémy Paul André Blachier

Remi Bouvier

Brice Taillet

François Trantoul

A method for manufacturing a composite panel is described. The method includes producing a first wall, a second wall, a third wall and a fourth wall from composite materials including an oxide matrix and long oxide fibres; from the first and second walls, producing a cellular core including a plurality of cells, each cell including a first end and an opposing second end, covering the first and second ends of the cells of the cellular core with the third wall and the fourth wall, respectively, so as to close the ends of said cells.

Method for manufacturing an acoustic panel

The invention relates to a three-dimensionally woven multilayer fibrous structure () having the same number of warp yarns woven at any level along the warp direction, the fibrous structure () comprising, in the warp direction, a first part () and a second part (), the first part () having a thickness measured in a direction perpendicular to the warp and weft directions, greater than the second part (), characterised in that the spacing between two weft planes along the warp direction is greater in the second part than in the first part (), and in that the number of weft yarns is lower in the second part () than in the first part ().

Method for manufacturing a ring sector

A tool for manufacturing a ceramic matrix composite part by injecting a slurry, the tool includes an injection chamber intended to receive at least one fibrous preform to be densified, wherein the injection chamber includes first injection ports which are formed in a first side of the injection chamber for injecting the slurry into the injection chamber, the first injection ports being distributed along the first side of the injection chamber; the injection chamber includes first drainage ports which are formed on the first side of the injection chamber for draining a liquid phase of the slurry from the injection chamber, the first drainage ports being distributed along the first side of the injection chamber; and the tool includes a first filtration element which is located on the first side of the injection chamber and which is located opposite the first drainage ports.

Tool and method for manufacturing a composite-material part by means of a liquid process

A process for manufacturing a part made of composite material with a matrix at least predominantly made of ceramic includes producing a fibrous structure by three-dimensional or multilayer weaving; shaping the fibrous structure to form a fibrous preform core; depositing an interphase on the fibers of the preform core; consolidating the preform core by partial densification of the core including the formation of a matrix phase by chemical vapor infiltration or by a liquid process; depositing a powder of ceramic particles in the porosity of the preform core; draping one or more layers of pre-impregnated non-woven fibers over all or part of the outer surface of the preform core; heat treatment of the preform core and of the pre-impregnated layer(s) to form a hybrid fibrous preform; further densifying by infiltration of the hybrid fibrous preform with an infiltration composition containing at least silicon to obtain a ceramic matrix composite part.

Method for manufacturing a part made from CMC

A process for manufacturing a composite material part includes formation of a fibrous texture from refractory ceramic fibres, placement of the fibrous texture in a mould with interposition of a filtration layer between the fibrous texture and a discharge port, the filtration layer including a partially densified fibrous structure, pressure injection of a slurry containing a powder of refractory ceramic particles into the fibrous texture, drainage by the filtration layer of the slurry solvent having passed through the fibrous texture and retention of the powder of refractory ceramic particles within the texture by the filtration layer to obtain a fibrous preform including the fibrous texture filled with refractory ceramic particles and the filtration layer, heat treatment of the refractory ceramic particles present in the fibrous texture of the preform to form a composite material part including the fibrous texture densified by a refractory ceramic matrix and the filtration layer.

Method for the production of a part made from a composite material, by means of the injection of powder into a fibrous reinforcement with drainage through a composite filtration layer

A process for manufacturing a ceramic matrix composite part, includes infiltrating a fibrous structure including a powder composition with a melt infiltration composition including at least silicon in order to form a ceramic matrix in the porosity of the fibrous structure, the powder composition including at least silicon carbide particles, wherein the silicon carbide particles have a bimodal size distribution with a first set of silicon carbide particles having a first average size and a second set of silicon carbide particles having a second average size smaller than the first average size, the number of particles in the first set being greater than the number of particles in the second set.

Method for manufacturing a part made of a composite material

The invention relates to the production of a composite material of a lobed structure () of a flow mixer which comprises a portion having a plurality of lobes (). For this purpose, a fibrous preform containing a resin will be produced in a simple geometric configuration of developable revolution. This is an intermediate state. By exploiting the thermoformable or thermosetting nature of the resin, the geometry of this intermediate preform is modified to deform it with limited offsets towards the final geometry.

Production in composite material of a lobed structure of a flow mixer

A method for producing a hollow part made of a ceramic matrix composite material. The method includes shaping a hollow fibrous preform. A core of oxidizable material is housed or inserted into the preform. The method also includes consolidating the preform and extracting the core by oxidising the core.

Method for producing a hollow part made of a ceramic matrix composite material

Disclosed is a method for manufacturing a multilayer data medium (), in which method: a multilayer data medium, including at least one transparent security layer (), and at least one marking layer (), sensitive to electromagnetic-marking radiation (), are selected; the transparent security layer () includes at least one semi-transparent printed image including at least one thermochromic dye; at least one marking () is made using the electromagnetic-marking radiation, through the printed image; the semi-transparent printed image reveals, in a first state referred to as the inactivated state, at least one semi-transparent visible pattern that makes it possible, after the marking step, to view the marking () through the image, the pattern not being visible in a second state, referred to as the activated state. The invention also relates to a multilayer data medium ().

Method for manufacturing a data medium and data medium thus obtained

A process for manufacturing a composite part includes arranging a fibrous preform in a mold including an impregnation chamber which includes in its lower part a filter by making a first face of the preform rest on the filter, the impregnation chamber being closed by a flexible membrane placed opposite a second face of the preform, the membrane separating the impregnation chamber from a compaction chamber. The process further includes injecting a compression fluid into the compaction chamber so as to apply a first pressure on the membrane and injecting a slurry including ceramic particles into the impregnation chamber with a second pressure while maintaining the injection of the compression fluid, the second injection pressure of the slurry being lower than the first pressure on the membrane.

Method for manufacturing a part made from a composite material by means of the injection of a laden ceramic slurry into a fibrous structure

A method of fabricating a curved cellular structure includes making an expandable fiber structure by multilayer weaving between layers of warp yarns and layers of weft yarns, the structure having zones of non-interlinking extending in the thickness of the structure, the non-interlinking zones spaced apart from one another by portions of interlinking between layers of weft yarns, the portions of interlinking offset by one or more weft yarns in a direction parallel to the direction of the layers of weft yarns between each series of these planes; impregnating the fiber structure with a resin; expanding the fiber structure on support tooling to form a cell in the fiber structure at each zone of non-interlinking, the tooling also presenting a curved shape corresponding to the shape of the cellular structure that is to be fabricated; and polymerizing the resin of the fiber structure to form a curved cellular structure.

Method for producing a curved honeycomb structure made from composite material

Disclosed is a method for the production of a multi-layer data medium by the hot rolling under pressure of a plurality of superimposed layers () having security inscriptions. Marking rolling is carried out on at least one layer to be marked () covered with a marking film () bearing inscriptions () in vitrophany applied in contact with the layer to be marked, then the marking film is separated from the layer to be marked, the latter having the security inscriptions.

Method for the production of a multi-layer data medium with security inscriptions

Disclosed is a method for manufacturing a multi-layer data medium by hot rolling under pressure, able to be marked under the effect of laser radiation applied to at least one outer surface () of this medium, in which at least one marking () with optically variable effect is disposed with respect to a laser marking sub-layer so that the outer surface () has a portion with optically variable effect optically superimposed on at least one part of the laser marking sub-layer and a portion () without marking with optically variable effect optically superimposed on at least one part of the laser marking sub-layer. These portions are produced with contents of at least one marking agent which is sensitive to the laser radiation which are different.

Method for manufacturing a multilayer data medium with security marking which can be marked by laser

Document comprising at least two photoluminescent images, security film and protective security method

A method for the secure protection of a portion of the surface of an official document bearing markings, in which: a transparent security layer () is selected, the layer including at least one semi-transparent printed image including at least one transparent binder and at least one thermochromic pigment (); the semi-transparent printed image reveals at least one semi-transparent visible pattern in a first non-activated state at least a first temperature, such that the markings can be seen through the image, the pattern not being visible in a second activated state at least a second temperature different from the first temperature. A device for the secure protection of a portion of the surface of an official document and such an official document are also described.

Method and device for the secure protection of an official document and official document thus protected

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Merignac, France

Eric Philippe