Patents Assigned to SAFRAN CERAMICS
  • Patent number: 10906205
    Abstract: A shaping tooling for chemical vapor infiltration of a fiber preform includes a structural enclosure formed by supports each provided with a multiply-perforated zone. Each of the supports has in its inside face an uncased zone that includes the multiply-perforated zone. The shaping tooling further includes first and second shaping mold functional elements, each present in a respective one of the uncased zones of the support. Each shaping mold functional element has a first face of a determined shape corresponding to the shape of the part that is to be made and a second face that is held facing the inside face of a support. Each functional element has a plurality of perforations and presents a number of perforations, a size of perforations, or a shape of perforations that differs from the number, the size, or the shape of the perforations present in the facing support.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: February 2, 2021
    Assignee: SAFRAN CERAMICS
    Inventors: Simon Thibaud, Adrien Delcamp, Sébastien Bertrand, Stéphane Goujard
  • Patent number: 10882795
    Abstract: A process for manufacturing a composite part includes introducing an adhesion promoter into the pores of a fibrous preform formed by threads covered with a coating having —OH groups on its surface, the adhesion promoter including an electron-withdrawing group G1 that is reactive according to a reaction of substitution or of nucleophilic addition with the —OH groups, and a reactive group G2; grafting the adhesion promoter to the surface of the coating by a reaction of substitution or nucleophilic addition of the —OH groups on the group G1; introducing a ceramic precursor resin into the pores of the fibrous preform; polymerizing the resin introduced and bonding the grafted adhesion promoter to the resin by chemical reaction between these two compounds at the level of the group G2, and forming a ceramic matrix phase in the pores of the fibrous preform by pyrolysis of the polymerized resin.
    Type: Grant
    Filed: June 13, 2018
    Date of Patent: January 5, 2021
    Assignees: SAFRAN CERAMICS, ARIANEGROUP SAS
    Inventors: Nicolas Eberling-Fux, Eric Bouillon, Guy Jacob, Eddy Goullianne
  • Patent number: 10858958
    Abstract: A turbine ring assembly includes a plurality of ring sectors of ceramic matrix composite material forming a turbine ring and a ring support structure secured to a turbine casing and having two annular flanges, each ring sector having two tabs held between the two annular flanges. The ring support structure includes an annular retention band mounted on the turbine casing, the annular retention band including an annular web forming one of the flanges. The two annular flanges exert stress on the tabs of the ring sectors. One of the flanges is elastically deformable in the axial direction of the turbine ring. The band has a first series of teeth distributed circumferentially on the band and the turbine casing has a second series of teeth distributed circumferentially on the casing, and the teeth of the first series and the teeth of the second series together provide circumferential jaw coupling.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: December 8, 2020
    Assignees: SAFRAN AIRCRAFT ENGINES, SAFRAN CERAMICS
    Inventors: Lucien Henri Jacques Quennehen, Sebastien Serge Francis Congratel
  • Publication number: 20200339243
    Abstract: A structure for the nacelle of an aircraft propulsion unit includes a first skin and stiffeners arranged to hold acoustic treatment modules against the first skin. Each acoustic treatment module includes a honeycomb core and a second skin, such that the honeycomb core is sandwiched between the first skin and the second skin. Such a structure allows the structural reinforcement function provided by the stiffeners to be separated from the acoustic treatment function performed by the acoustic treatment modules which are simply bearing on the first skin.
    Type: Application
    Filed: July 6, 2020
    Publication date: October 29, 2020
    Applicants: Safran Nacelles, Safran Ceramics
    Inventors: Florent BOUILLON, Franck DUPE, Benoît CARRERE, Bertrand DESJOYEAUX
  • Publication number: 20200300196
    Abstract: A panel for a nacelle of an aircraft propulsion assembly includes two skins and a cell structure provided with transverse partitions defining cells. The cell structure includes folds with at least one central part forming at least one part of at least one transverse partition and at least one peripheral part extending along at least one of the skins. A nacelle with such a panel is provided, as well as a method for manufacturing such a panel.
    Type: Application
    Filed: February 25, 2020
    Publication date: September 24, 2020
    Applicants: Safran Nacelles, Safran Ceramics
    Inventors: Bertrand DESJOYEAUX, Davi SILVA DE VASCONCELLOS, Florent BOUILLON, Arnaud DELEHOUZE
  • Publication number: 20200270180
    Abstract: The invention relates to a method for producing a hollow part made of a ceramic matrix composite material comprising the steps of: shaping a hollow fibrous preform, a core of oxidizable material being housed or inserted into the preform (E1); consolidating said preform (E3, E4); and extracting the core by oxidising said core (E5).
    Type: Application
    Filed: September 25, 2018
    Publication date: August 27, 2020
    Applicant: Safran Ceramics
    Inventors: Matthieu Arnaud Gimat, Rémy Dupont, Maxime François Roger Carlin, Eric Philippe, Benjamin Lacombe
  • Publication number: 20200255344
    Abstract: Method for manufacturing a CMC, i.e. ceramic matrix composite material, part provided with at least one cutout, as well as to such a CMC part provided with at least one cutout, the method comprising the following steps: providing (E1) a fibrous reinforcement (10), forming (E2?) a cavity in a portion of the fibrous reinforcement (10), injecting (E3) a slip comprising at least a ceramic powder and a solvent, the slip being injected so as to impregnate the fibrous reinforcement (10?) and to fill the cavity of the fibrous reinforcement (10?), drying (E4) the obtained assembly, carrying out a densification (E6) by infiltration of a liquid densification material and solidification of said densification material, machining (E7) at least one cutout in the obtained blank (30) within the volume corresponding to the cavity of the fibrous reinforcement (10).
    Type: Application
    Filed: September 13, 2018
    Publication date: August 13, 2020
    Applicant: Safran Ceramics
    Inventors: Maxime François Roger CARLIN, Nicolas EBERLING-FUX, Eddy GOULLIANNE, Thierry Guy Xavier TESSON
  • Patent number: 10724399
    Abstract: A turbine ring sector made of ceramic matrix composite material has a portion forming an annular base with an inner face for defining the inner face of a turbine ring when the ring sector is mounted on a ring support structure and an outer face from which there extends an attachment portion for attaching the ring sector to the ring support structure, the ring sector further including inter-sector faces, each for facing a neighboring ring sector when the ring sector is mounted on the ring support structure; wherein the inter-sector faces are coated in an environmental barrier that is doped with an electrically-conductive compound and that presents at least one slot.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: July 28, 2020
    Assignee: SAFRAN CERAMICS
    Inventors: Maxime Carlin, Lisa Pin
  • Patent number: 10723658
    Abstract: A method of fabricating a ceramic material, the method including forming a ceramic material by performing a first chemical reaction at least between a first powder of an intermetallic compound and a reactive gas phase, a liquid phase being present around the grains of the first powder during the first chemical reaction, the liquid gas phase being obtained from a second powder of a metallic compound by melting the second powder or as a result of a second chemical reaction between at least one element of the first powder and at least one metallic element of the second powder, a working temperature being imposed during the formation of the ceramic material, which temperature is low enough to avoid melting the first powder.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: July 28, 2020
    Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, SAFRAN CERAMICS
    Inventors: Laurence Maille, Jérôme Roger, Yann Le Petitcorps, Bernard Reignier
  • Patent number: 10690007
    Abstract: A turbine ring assembly includes both a plurality of ring sectors made of ceramic matrix composite material forming a turbine ring and also a ring support structure having two annular flanges, each ring sector having two tabs held respectively between the two annular flanges of the ring support structure. The two annular flanges of the ring support structure exert stress on the tabs of the ring sectors. One of the flanges of the ring support structure is elastically deformable in the axial direction of the turbine ring. The turbine ring assembly further includes a plurality of pegs engaged both in the annular flanges of the ring support structure and in the tabs of the ring sectors facing the annular flanges.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: June 23, 2020
    Assignees: SAFRAN AIRCRAFT ENGINES, SAFRAN CERAMICS
    Inventors: Lucien Henri Jacques Quennehen, Sebastien Serge Francis Congratel
  • Patent number: 10689298
    Abstract: A composite material part includes fiber reinforcement made of carbon or ceramic yarns and a matrix that is mostly ceramic, the part further including a first interphase layer covering the yarns and present between the yarns and the matrix, the first interphase layer being a layer of boron nitride doped with aluminum and presenting an atom content of aluminum lying in the range 5% to 15%.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: June 23, 2020
    Assignees: SAFRAN CERAMICS, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Emilien Buet, Paul Carminati, Sylvain Lucien Jacques, Francis Rebillat
  • Publication number: 20200189717
    Abstract: The present disclosure relates to a cell structure for an acoustic attenuation device for a nacelle of an aircraft propulsion assembly. This cell structure includes lateral partitions forming channels that each extend between a first end and a second end and skin elements arranged so that each channel is at least partly closed at the first end thereof by at least one skin element. Each skin element is connected to a respective lateral partition and can move relative to the other lateral partitions. A continuous skin can be assembled on this cell structure so as to at least partly close the channels at the second end thereof and to thus form an acoustic attenuation device.
    Type: Application
    Filed: February 25, 2020
    Publication date: June 18, 2020
    Applicants: Safran Nacelles, Safran Ceramics
    Inventors: Bertrand DESJOYEAUX, Davi SILVA DE VASCONCELLOS, Florent BOUILLON, Arnaud DELEHOUZE
  • Patent number: 10662117
    Abstract: A method of fabricating a part out of ceramic matrix composite material, the method including infiltrating a fiber preform with a molten composition including a majority by weight of silicon, the fiber preform including silicon carbide fibers, silicon carbide powder being present in the pores of said preform, a mean size of silicon carbide crystallites in the powder being less than the mean size of the silicon carbide crystallites in the fibers, a ceramic matrix being formed in the pores of the fiber preform during the infiltration so as to obtain the part made of composite material.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: May 26, 2020
    Assignees: SAFRAN CERAMICS, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Emilie Mendez, Jérôme Roger, Yann Lepetitcorps
  • Patent number: 10655501
    Abstract: A turbine ring assembly includes ring sectors made of ceramic matrix composite material forming a turbine ring and a ring support structure having first and second annular flanges, each ring sector having first and second tabs held between the flanges. First and second holder elements secured to the first annular flange being received in first and second openings in the first tab, while first and second holder elements secured to the second annular flange are in first and second openings in the second tab. Radial clearance is being present when cold between the openings and the portions of the holder elements present in the openings. The first and second annular flanges include, on their faces facing the first and second tabs, a plurality of thrust portions distributed in circumferential manner over the flanges, the ends of the tabs, when cold, being in radial abutment against two thrust portions.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: May 19, 2020
    Assignees: SAFRAN CERAMICS, SAFRAN AIRCRAFT ENGINES
    Inventors: Gilles Lepretre, Thierry Tesson, Adéle Lyprendi, Thomas Revel
  • Patent number: 10619291
    Abstract: A device for coating one or more yarns by a vapor deposition method, the device including a treatment chamber extending along a longitudinal axis and having a treatment zone between an internal and an external circumferential wall, and within which at least one yarn is to be coated by performing a vapor deposition method; a conveyor system to transport the at least one yarn through the treatment zone; an injector device to inject a treatment gas phase into the treatment zone through an inlet orifice present in the internal or external circumferential wall; and a removal device to remove the residual gas phase from the treatment zone through an outlet orifice present in the internal or external circumferential wall, the inlet and the outlet orifice being situated in a common plane perpendicular to the longitudinal axis of the chamber and being offset around the circumferential direction of the chamber.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: April 14, 2020
    Assignee: SAFRAN CERAMICS
    Inventors: Emilien Buet, Simon Thibaud, Adrien Delcamp, Cédric Descamps
  • Patent number: 10612186
    Abstract: 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.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: April 7, 2020
    Assignee: SAFRAN CERAMICS
    Inventors: Stéphanie Fouquet, Sébastien Jimenez, Eric Philippe, François Charleux
  • Patent number: 10597782
    Abstract: A device for coating one or more yarns by a vapor deposition method, the device including a treatment chamber defining a first and a second treatment zone in which at least one yarn is to be coated by performing a vapor deposition method, the first and second zones being separated by a wall and the first zone surrounding the second zone, or being superposed on the second zone; a conveyor system to transport the at least one yarn through the first and second zones; a first injector device to inject a first treatment gas phase into the first zone and a first removal device configured to remove the residual first gas phase from the first zone; and a second injector device configured to inject a second treatment gas phase into the second zone, and a second removal device configured to remove the residual second gas phase from the second zone.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: March 24, 2020
    Assignee: SAFRAN CERAMICS
    Inventors: Emilien Buet, Simon Thibaud, Adrien Delcamp, Cédric Descamps
  • Patent number: 10590803
    Abstract: A turbine ring assembly includes ring sectors made as a single piece of ceramic matrix composite material and being for mounting on a metal ring support structure, the ring support structure having two tabs extending radially towards a gas flow passage, each ring sector having a first portion forming an annular base with a radially inside face defining the inside face of the turbine ring and an outside face from which there extend two tab-forming portions, the ring sectors having a section that is substantially ? shaped. The tabs of each ring sector fit axially over the tabs of the ring support structure with contact between the tabs of the ring support structure and the tabs of each ring sector when cold. The tabs of each ring sector are held to the ring support structure by pegs passing through holes formed in the tabs of each ring sector.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: March 17, 2020
    Assignees: SAFRAN AIRCRAFT ENGINES, SAFRAN CERAMICS
    Inventors: Lucien Henri Jacques Quennehen, Gaël Frédéric Claude Cyrille Evain, David Mathieu Paul Marsal, Thierry Guy Xavier Tesson
  • Publication number: 20200071234
    Abstract: A part for an aircraft turbojet engine nacelle is made of a composite material and includes at least one outer face (S1), a fibrous preform including fiber locks and having a surface(s) delimiting depressions between fiber locks, a covering material which at least partially covers the surface(s) of the fibrous preform and in particular the depressions, and a matrix which binds entirely the covering material and the fibrous preform. The covering material is a fibrous mat and the outer face (S1) is smooth. A method for manufacturing such a part includes manufacturing the fibrous preform, providing a fibrous mat, depositing the fibrous preform and fibrous mat in a mold, dispersing the matrix between the fibers of the preform and mat and consolidating the fibrous preform and mat.
    Type: Application
    Filed: August 29, 2019
    Publication date: March 5, 2020
    Applicants: Safran Nacelles, Safran Ceramics
    Inventors: Bertrand DESJOYEAUX, Davi SILVA DE VASCONCELLOS, Aline PLANKEEL
  • Patent number: 10578054
    Abstract: A variable section nozzle includes an ejection casing and a plurality of internal flaps arranged in a ring downstream from the ejection casing. Each internal flap is connected to the ejection casing by a movable lever pivotally mounted to the downstream end of the ejection casing. Each lever is movable between a first position in which the internal flaps are in a high position and a second position in which the internal flaps are in a folded-down position. The nozzle includes a plurality of rigid movement transmission parts distributed circumferentially around the ejection casing. Each rigid movement transmission part is connected to two adjacent levers by connecting rods, and to a control actuator. Each rigid movement transmission part can move in a direction corresponding to the axial direction of the nozzle under the action of the control actuator to move the adjacent levers between the first and second positions.
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: March 3, 2020
    Assignees: SAFRAN CERAMICS, SAFRAN AIRCRAFT ENGINES
    Inventors: Gilles Lepretre, Julien Tran