Coating composition for high temperature protection

US6221181A · kind A · utility

Assignee

• ABB RESEARCH LTD. · CH

Inventors

• Hans-Peter Bossmann · Lauchringen, DE
• Hans Joachim Schmutzler · Maikammer, DE
• Marianne Sommer · Walldorf, DE
• Christoph Sommer · Plankstadt, DE
• Maxim Konter · Untersiggenthal, CH
• Peter Holmes · Winkel, CH
• Christoph Toennes · Brugg, CH

Key dates

• Filing date: Sep 1, 1999
• Grant date: Apr 24, 2001
• Expiry date: Sep 1, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12944
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The invention relates to a coating composition for superalloy structural parts, especially for gas turbine vanes and blades, which provides simultaneously excellent environmental resistance and highly improved thermomechanical behavior. The coating consists essentially of, by weight, 28-35% Co, 11-15% Cr, 10-13% Al, 0-1% Re, 1-2% Si, 0.2-1% Ta, 0.005-0.5% Y, 0-5% Ru, 0-1% Ca, 0-1% Mg, 0-0.5% La (or elements from the La series), 0-0.1% B, balance Ni and incidental impurities.