Search

CN-122029031-A - Method of manufacturing an organic matrix composite component comprising an elastomer layer

CN122029031ACN 122029031 ACN122029031 ACN 122029031ACN-122029031-A

Abstract

The invention relates to a method for manufacturing an organic matrix composite component comprising at least one elastomer layer, the method comprising the steps of producing a fibrous preform (100), consolidating the fibrous preform (110) with an organic matrix to obtain an organic matrix composite component, bonding at least one vulcanized unsaturated elastomer layer to the organic matrix composite component (130), wherein an adhesive film is interposed between the component and the bonding surface of the one or more unsaturated elastomer layers. The method comprises a step (120) of preparing a joining surface (20 a) of each unsaturated elastomer layer prior to the bonding step (130), wherein the preparing step comprises grafting a halogen element onto the joining surface by a halogenation reaction.

Inventors

  • Alexander. Euan

Assignees

  • 赛峰集团

Dates

Publication Date
20260512
Application Date
20241001
Priority Date
20231010

Claims (10)

  1. 1. A method for manufacturing an organic matrix composite component (10) comprising at least one elastomer layer (20), comprising the steps of: -producing a fibre preform (100), Consolidating the fiber preform (110) with an organic matrix to obtain an organic matrix composite part, -Bonding at least one unsaturated elastomer layer to the organic matrix composite component (130), wherein an adhesive film is interposed between the component and the joining surface of the one or more unsaturated elastomer layers, characterized in that prior to the bonding step (130), a step (120) of preparing the joining surface (20 a) of each unsaturated elastomer layer is included, wherein the preparation step comprises grafting a halogen element onto the joining surface by means of a halogenation reaction.
  2. 2. The method of claim 1, wherein the step of preparing the bonding surface of the one or more unsaturated elastomer layers comprises applying a trichloroisocyanuric acid solution to at least the bonding surface.
  3. 3. The method of claim 1, wherein the step of preparing the bonding surface of the one or more unsaturated elastomer layers comprises electrophilic addition halogenation with a halogen simple substance or a halide.
  4. 4. A method according to any one of claims 1 to 3, wherein the thickness of the at least one elastomeric layer (20) is greater than or equal to 0.2 mm.
  5. 5. A method for manufacturing an organic matrix composite component (10) comprising at least one elastomer layer (20), comprising the steps of: contacting (220, 320) the joining surface (20 a) of the at least one unsaturated elastomer layer (20) with the fiber preform, Converting the resin present in the fiber preform into an organic matrix (240, 330) by heat treatment to obtain an organic matrix composite component (10) comprising one or more elastomer layers (20), Characterized in that it comprises, before the contacting step, a step (210, 310) of preparing the joining surface (20 a) of each unsaturated elastomer layer (20), wherein said preparing step comprises grafting a halogen element onto said joining surface by means of a halogenation reaction.
  6. 6. The method of claim 5, comprising producing a fiber preform (200) prior to the contacting step (220), and injecting resin into the fiber preform (230) after the contacting step.
  7. 7. The method of claim 5, comprising producing a fiber preform (300) by laying down a fiber layer pre-impregnated with resin prior to the contacting step (320).
  8. 8. The method of any of claims 5 to 7, wherein the step of preparing the bonding surface of the one or more unsaturated elastomer layers comprises applying a trichloroisocyanuric acid solution to at least the bonding surface.
  9. 9. The method of any of claims 5 to 7, wherein the step of preparing the bonding surface of the one or more unsaturated elastomer layers comprises electrophilic addition halogenation with a halogen simple substance or a halide.
  10. 10. The method according to any one of claims 5 to 9, wherein the thickness of the at least one elastomeric layer (20) is greater than or equal to 0.2 mm.

Description

Method of manufacturing an organic matrix composite component comprising an elastomer layer Technical Field The present invention relates to the general field of manufacturing Organic Matrix Composite (OMC) components, i.e. components comprising fiber reinforcement densified by an organic matrix. Background These components are generally made from a fibrous preform impregnated with a resin (in particular an epoxy resin) which, when polymerized, forms an organic matrix within the fibrous preform. In the field of aeronautics, several types of components, such as fan blades or fan casings, are made of organic matrix composite materials. These components are subjected to high levels of vibration, which may lead to vibration instability (e.g., chatter) and/or reduced fatigue life under forced excitation (crosswind, ground effect, etc.). In order to reduce the vibration level, it is known to impart vibration damping characteristics to an organic matrix composite component by adding one or more elastomer layers. U.S. patent publication US 2009/074586 discloses the use of an elastomer on an organic matrix composite fan blade to introduce a mechanical damping function to the blade. The adhesion strength of the elastomer to the component organic matrix composite is critical to ensure the intended function of the elastomer (e.g., vibration damping). For this purpose, surface treatments exist to increase the adhesion of the elastomer to the organic matrix composite (whether consolidated or unconsolidated). These treatments may be mechanical (abrasive), such as sanding or sandblasting, or chemical, such as applying a primer or vulcanization aid, or surface activation (plasma). Mechanical treatments such as sanding or sandblasting are difficult to perform on thin elastomeric films because they deform the film during the treatment process and in the most extreme cases even damage the film. Even with such a treatment, adhesion failure at the interface between the elastomer layer and the organic matrix composite was observed in adhesion tests (out-of-plane tensile strength, peel strength, etc.). For critical components such as propeller or fan blades, these adhesion failures are unacceptable from an authentication point of view. Furthermore, most known prior art surface treatments have a limited lifetime and require treatment within days or even hours before the elastomer is adhered to the organic matrix composite stage. This places a significant limitation on the method of making the organic matrix composite component. Accordingly, a solution is needed that can improve the adhesion properties of elastomers to organic matrix composites. Disclosure of Invention To this end, the invention proposes a method for manufacturing an organic matrix composite component comprising at least one elastomer layer, comprising the steps of: -the production of a fibre preform, Consolidating the fiber preform with an organic matrix to obtain an organic matrix composite part, Bonding at least one unsaturated elastomer layer to the organic matrix composite component, wherein an adhesive film is interposed between the component and the joining surface of the one or more unsaturated elastomer layers, Characterized in that, before the bonding step, a step of preparing a joining surface of each unsaturated elastomer layer is included, wherein the preparing step includes grafting a halogen element onto the joining surface by a halogenation reaction. The preparation by the halogenation reaction causes the unsaturation of the elastomer bonding surface to be saturated with halogen which will create a polar bond with the adhesive during bonding, thereby enhancing the adhesion of the elastomer to the part organic matrix composite. Thus, elastomer inner polymerization failure meeting aircraft component certification requirements can be achieved while achieving particularly high peel strength values. The step of preparing the elastomer bonding surface by halogenation also has the advantage of being stable for several weeks. This greatly simplifies the manufacturing process, since the step of bonding to the organic matrix composite material is no longer required immediately after the preparation step of the elastomer assembly stage. According to a particular feature of the method of the invention, the step of preparing the joining surface of the one or more unsaturated elastomer layers comprises an electrophilic addition halogenation reaction with a dihalogen or a halide. According to another particular feature of the method of the invention, the step of preparing the joining surface of the one or more unsaturated elastomer layers comprises applying a trichloroisocyanuric acid solution to at least the joining surface. Trichloroisocyanuric acid has the advantage of not being recognized as a hazardous chemical by the european union "chemical Registration, evaluation, authorisation of Chemicals" regulations (also known as "REACH"). According to another particu