Composite reinforcing insert and manufacturing method
View Patent ↗A composite reinforcement insert includes a strand formed by a central fiber made of ceramic material surrounded by filaments of metal alloy helically wound around the central fiber, and a metal reinforcement layer covering the strand.
1. A composite reinforcing insert comprising:
a strand consisting of a central fibre made of a ceramic material surrounded by metal alloy filaments wound spirally around the central fibre, and
a metal reinforcing layer coating the strand.
2. The composite reinforcing insert according to claim 1 , wherein the strand comprises N filaments, where N is greater than or equal to 6.
3. The composite reinforcing insert according to claim 1 , wherein the central fibre is made of silicon carbide.
4. The composite reinforcing insert according to claim 1 , wherein the filaments are made of an alloy based on titanium, nickel or aluminium.
5. The composite reinforcing insert according to claim 1 , wherein the reinforcing layer is made from the same material as a basic material forming the filaments.
6. A turbomachine part comprising a composite reinforcing insert including
a strand consisting of a central fibre made of a ceramic material surrounded by metal alloy filaments wound spirally around the central fibre, and
a metal reinforcing layer coating the strand.
7. A method of making a reinforcing insert from a central ceramic fibre, the method comprising:
stranding metal alloy filaments around the central fibre so as to form a strand, and
coating the strand with a protective metal layer.
8. The method according to claim 7 , wherein the coating includes dipping the strand into a liquid metal bath in levitation fusion, the liquid metal in levitation fusion containing a filler with the same material as a basic material of the filaments.
9. The method according to claim 7 , further comprising fixing the filaments by spot welds.
10. The method according to claim 7 , further comprising, between the stranding and the coating, coating the strand with an oxidation-resistant protective layer.
11. The composite reinforcing insert according to claim 2 , wherein N is equal to 7, 19 or 37.