Single crystal, environmentally-resistant gas turbine shroud

Details Single crystal, environmentally-resistant gas turbine shroud Single crystal, environmentally-resistant gas turbine shroud

1990-09-05

1993-08-31

Yee, Deborah

Metal treatment

Stock

Directionally solidified

148410, 148428, C22C 1905

Patent

active

052405184

ABSTRACT:
A single crystal shroud, preferably used around the high pressure turbine section of a gas turbine engine, has a composition, in weight percent, of from about 5 to about 10 percent chromium, from about 5 to about 10 percent cobalt, from 0 to about 2 percent molybdenum, from about 3 to about 10 percent tungsten, from about 3 to about 8 percent tantalum, from 0 to about 2 percent titanium, from about 5 to about 7 percent aluminum, from 0 to about 6 percent rhenium, from 0 to about 0.50 percent hafnium, from 0 to about 0.07 percent carbon, from 0 to about 0.015 percent boron, and from 0 to about 0.075 percent yttrium, balance nickel. The environmentally- resistant shroud preferably is used in the as-cast condition without any oxidation and corrosion resistant flowpath coating.

REFERENCES:
patent: 4459160 (1984-07-01), Meetham et al.
patent: 4719080 (1988-01-01), Duhl et al.
patent: 4804311 (1989-02-01), Anderson et al.
patent: 4923525 (1990-05-01), Khan et al.

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