Environmentally-resistant turbine blade tip

Details Environmentally-resistant turbine blade tip Environmentally-resistant turbine blade tip

1995-11-01

1996-12-17

Larson, James

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Coating, specific composition or characteristic

148428, 420445, 428680, F01D 528

Patent

active

055846637

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.

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