Powder material for an abradable seal
View Patent ↗A powder material for forming an abradable coating, the material comprising a metal powder based for the most part on aluminum and containing manganese or calcium. The material is applicable to seals of a turbomachine.
1. A powder material for forming an abradable coating, the material comprising:
a metal powder based for the most part on aluminum and containing manganese or calcium, the manganese or calcium of said metal powder representing 5% to 20% by weight of said metal powder, and said metal powder comprising one or more additional metal elements, individual quantities of each additional metal element being less than 5% of the weight of the metal power; and
an organic powder, said organic powder representing 5% to 15% of the total weight of said material.
2. A material according to claim 1 , wherein said organic powder comprises any one of the following components: polyester, polymethyl acrylate, and polyimide.
3. A material according to claim 1 , further comprising a ceramic powder.
4. A material according to claim 3 , wherein said ceramic powder represents 5% to 20% of the total weight of said material.
5. A material according to claim 3 , wherein said ceramic powder comprises any one of the following components: boron nitride, molybdenum disulfide, graphite, talc, bentonite, and mica.
6. A material according to claim 1 , wherein said metal powder further comprises one or more of chromium, molybdenum, nickel, silicon, and iron.
7. A material according to claim 1 , wherein the one or more additional metal elements of said metal powder represents not more than 10% of the weight of said metal powder.
8. A material according to claim 1 , wherein said metal powder represents 65% to 90% of the total weight of said material.
9. A material according to claim 1 , wherein said metal powder is an AlMn5 alloy.
10. A material according to claim 9 , further comprising hexagonal boron nitride and polyester.
11. An abradable coating for a seal, the coating being obtained by thermal sputtering of a powder material according to claim 1 .
12. A powder material for forming an abradable coating, the material comprising:
an AlMn5 alloy metal powder based for the most part on aluminium and containing manganese;
hexagonal boron nitride; and
polyester,
wherein said AlMn5 alloy represents 75% of the total weight of the material, said hexagonal boron nitride represents 15% of the total weight of the material, and said polyester represents 10% of the total weight of the material.
13. An abradable coating for a seal, the coating being obtained by thermal sputtering of a powder material according to claim 12 .
14. A powder material for forming an abradable coating, the material comprising:
an AlMn5 alloy metal powder based for the most part on aluminium and containing manganese, the manganese of said metal powder representing 5% to 20% by weight of said metal powder, and said metal powder comprising one or more additional metal elements, individual quantities of each additional metal element being less than 5% of the weight of the metal powder;
hexagonal boron nitride; and
polyester,
wherein said AlMn5 alloy represents 75% of the total weight of the material, said hexagonal boron nitride represents 15% of the total weight of the material, and said polyester represents 10% of the total weight of the material.
15. A seal comprising a coating obtained by a powder material according to claim 1 .
16. A seal comprising a coating obtained by a powder material according to claim 12 .
17. A turbomachine compressor comprising a seal according to claim 15 .
18. A turbomachine compressor comprising a seal according to claim 16 .
19. A turbomachine comprising a seal according to claim 15 .
20. A turbomachine comprising a seal according to claim 16 .