Process for bonding a heating mat to a turbomachine blade

A process for bonding an elastomer multilayer with integrated heating system and a thermosetting elastomer surface layer to at least one of surfaces of a composite and/or titanium-based alloy substrate, said process comprising the following steps:

• A—preparing at least one surface of a composite and/or titanium-based alloy substrate;
• B—applying an epoxy adhesive film having a curing temperature enabling complete crosslinking, of less than or equal to 126° C., to the surface of the substrate prepared in step A,
• C—positioning an elastomer multilayer with integrated heating system and a thermosetting elastomer surface layer so that said thermosetting elastomer surface layer is in contact with the surface of the substrate coated with the adhesive, obtained in step B,
• D—placing the substrate-adhesive-multilayer assembly obtained in step C in a vacuum bag and applying a vacuum for a time period of between 5 and 15 minutes,
• E—heating the substrate-adhesive-multilayer assembly obtained in step D, in a vacuum bag in an autoclave to the polymerisation temperature of the adhesive and at a relative pressure in the vacuum bag of less than-0.02 MPa,
• F—recovering the total bonded assembly composed of a composite or titanium-based alloy substrate, on at least one of the surfaces of which an elastomer multilayer with integrated heating system and a thermosetting elastomer surface layer is bonded.