Abradable seal having improved properties and method of producin

Details Abradable seal having improved properties and method of producin Abradable seal having improved properties and method of producin

1998-12-18

2000-07-18

Look, Edward K.

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

Between blade edge and static part

4151744, 428553, 428652, 428654, 428937, F01D 1112

Patent

active

060898259

ABSTRACT:
An air seal for use in a gas turbine engine includes reduced susceptibility to deflagration during operating conditions in which an excessive amount of seal material is liberated from the seal and ingested into the engine. The seal includes a seal substrate, and a thermally sprayed metallic bond layer applied to the seal substrate. The bond layer includes nickel and aluminum. The seal also includes a thermally sprayed abradable seal layer applied to the bond layer. The abradable material is composed of aluminum powder and silicon powder forming a metal matrix, and co-deposited methyl methacrylate particles embedded as filler in the metal matrix. The filler is less likely to deflagrate compared to conventionally used materials such as polyester.

REFERENCES:
patent: 4696855 (1987-09-01), Petit, Jr. et al.
patent: 4936745 (1990-06-01), Vine et al.
patent: 5536022 (1996-07-01), Sileo et al.
patent: 5705231 (1998-01-01), Nissley et al.
patent: 5780116 (1998-07-01), Sileo et al.

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