Heat-insulating layer system

US7445851B2 · kind B2 · utility

Assignees

• MTU Aero Engines AG · DE
• Forschungszentrum Jülich GmbH · DE

Inventors

• Christian Friedrich · Munich, DE
• Wolfgang Wachter · Eschen, LI
• Detlev Stoever · Niederzier, DE
• Gerhard Pracht · Emmelshausen, DE
• Robert Vassen · Herzogenrath, DE
• Bilge Saruhan-Brings · Troisdorf, DE
• Claus-Juergen Kroeder · Sankt Augustin, DE
• Uwe Schulz · Neunkirchen, DE

Key dates

• Filing date: May 24, 2005
• Grant date: Nov 4, 2008
• Expiry date: May 24, 2025

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12611
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A heat-insulating layer system for a metallic structural component, especially for a structural component of a gas turbine such as an aircraft engine, includes an adhesion promoting layer (12), an inner contact layer (14), and an outer cover layer (15) , whereby the adhesion promoting layer (12). is disposed on a surface (11) of the gas turbine structural component (10). The inner contact layer (14) is formed of a zirconium oxide partially stabilized with yttrium or yttrium oxide, and the outer cover layer (15) is formed of a material that consists of at least one component with at least one phase, which stoichiometrically comprises 1 to 80 Mol-% Mx2O3, 0.5 to 80 Mol-% MyO and Al2O3 as a remainder with incidental impurities, wherein Mx is selected from the elements chromium and barium or mixtures thereof, and wherein My is selected from the alkaline earth metals, the transition metals and the rare earths or mixtures thereof.