Abradable layer for a turbo-engine and a manufacturing process

US5326647A · kind A · utility

Assignee

• MTU Motoren-und Turbinen-Union · DE

Inventors

• Herbert Merz · Ingelheim am Rhein, DE
• Wolfgang Weiler · Dachau, DE

Key dates

• Filing date: May 17, 1993
• Grant date: Jul 5, 1994
• Expiry date: May 17, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12444
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

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.