Abradable layer for a turbo-engine and a manufacturing process
AssigneeMTU Motoren-und Turbinen-Union
InventorsHerbert Merz, Wolfgang Weiler
Life of this patent
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Abstract
An abradable layer for labyrinth seals of a turbo-engine, particularly a gas turbine is provided. The labyrinth is made of a layered composite material with a core and a shell and embedments. A process for the manufacturing of this abradable layer is provided. In this case, the core is made of a felted or three-dimensionally crosslinked fiber body made of iron base, nickel base or cobalt base alloys and the shell consists of one or several precious metals or precious-metal alloys. Each core is completely surrounded by the shell material, in which case the embedments consist of oxidation-stable sliding materials of the oxide, carbide or nitride group with a hexagonal crystal lattice layer structure.
Claims14
An inlet coating for labyrinth seals of a turbo-engine, the labyrinth seals being made of a layered composite material having a core, shell and embedments wherein the core is composed of one of a felted and three-dimensionally crosslinked fiber body made of one of an iron base alloy, nickel base alloy and cobalt base alloy;
- wherein the shell is made of a shell material composed of at least one precious metal or precious-metal alloy, the core being completely surrounded by the shell material, and wherein the embedments are made of oxidation-stable sliding materials of the oxide, carbide or nitride group with a hexagonal crystal lattice layer structure.
A process for the manufacturing of an inlet coating for labyrinth seals of a turbo-engine, the labyrinth seals being made of a layered composite material having a core, shell and embedments wherein the core is composed of one of a felted and three-dimensionally crosslinked fiber body made of one of an iron base alloy, nickel base alloy and cobalt base alloy;
- wherein the shell is made of a shell material composed of at least one precious metal or precious-metal alloy, the core being completely surrounded by the shell material, and wherein the embedments are made of oxidation-stable sliding materials of the oxide, carbide or nitride group with a hexagonal crystal lattice layer structure, the process comprising the steps of:
- first coating the core material with one or two precious metals or their alloys;
- second completely or partially filling the spaces or pores of the fiber body with embedments so that a crude-fiber body is created;
- processing the crude-fiber body to form an inlet coating blank;
- and
- compressing the inlet coating blank to form an inlet coating.
Dependencies are inferred from the claim text.