Method for manufacturing a vane made from composite material comprising a serration element and an anti-erosion coating

A method for manufacturing a vane made from composite material for a turbomachine, the vane having a blade that includes a leading edge, a trailing edge, a pressure side, a suction side extending between the leading edge and the trailing edge, at least one serration element on the leading edge and/or the trailing edge, and at least one anti-erosion coating covering the serration element, the method comprising the steps of:

• (a) providing a first fibrous preform configured to form a part of the blade comprising the leading edge, the trailing edge, the pressure side and the suction side,
• (b) installing the first fibrous preform in a tooling,
• (c) depositing, at least in part, at least one second fibrous preform on at least one portion of at least one edge of the first fibrous preform configured to form the leading edge and/or the trailing edge in the tooling, this second fibrous preform having a corrugated or toothed edge configured to form the at least one serration element,
• (d) depositing the at least one anti-erosion coating in the tooling, so as to cover the corrugated or toothed edge, and optionally the at least part of a pressure side and/or a suction side of the first fibrous preform, and
• (e) injecting a resin into the tooling so that the resin impregnates the first and second fibrous preforms to form the vane, and securing the second fibrous preform to the anti-erosion coating with the resin.