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US 4,049,428 AGranted
Metal porous abradable seal
AssigneeUnion Carbide Corporation
InventorsRaymond John Elbert, Ernest Gilbert Farrier
Life of this patent
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Abstract
A low density abradable seal produced by depositing metallic particles onto a binder coated substrate and then heat treating the coated substrate to produce a porous coating structure having excellent erosion and oxidation resistance and abradability characteristics.
Claims10
A process for producing a metal porous abradable structure comprising the steps:
- a. depositing a coating of a binder material onto a substrate to produce a tacky surface layer sufficient to secure metal particles sprinkled thereon against the force of gravity when said layer is inverted,
- b. depositing metal particles onto said tacky binder layer to produce a metallic monolayer thereon;
- c. repeating the steps (a) and (b) at least once to produce a multilayer deposit of particles secured in the binder;
- and
- d. heating said deposited multilayer in the as-deposited state at a temperature and for a time period sufficient to substantially remove the binder and to sinter the metallic particles together thereby forming a porous abradable structure.
2 more elements
Dependencies are inferred from the claim text.