Environmentally-resistant turbine blade tip

US5584663A · kind A · utility

Assignee

• General Electric Company · US

Inventors

• Jerry D. Schell · Evendale, US
• Howard J. Farr · Blue Ash, US
• Thomas Jeffrey Kelley · Mesa, US
• Paul J. E. Monson · Loveland, US
• Stephen Joseph Ferrigno · Cincinnati, US

Key dates

• Filing date: Nov 1, 1995
• Grant date: Dec 17, 1996
• Expiry date: Nov 1, 2015

Classification

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

Abstract

A family of environmentally-resistant alloys is provided which are suitable for forming a blade tip for a turbine blade of a gas turbine engine. The blade tip alloys preferably have a chemical composition of, in weight percent, about 14 to about 18 percent chromium, about 6.45 to about 6.95 percent aluminum, about 9.75 to about 11.45 percent cobalt, about 5.95 to about 6.55 percent tantalum, about 1.85 to about 2.35 percent rhenium, about 0.05 to about 1.75 percent hafnium, about 0.006 to about 0.03 percent zirconium, about 0.02 to about 0.11 percent carbon, up to about 1.1 percent silicon, up to about percent 0.01 percent boron, with the balance being nickel and typical impurities.