Method for constructing a turbine shroud

Details Method for constructing a turbine shroud Method for constructing a turbine shroud

1979-10-12

1981-07-28

Smith, Leonard E.

Plastic and nonmetallic article shaping or treating: processes

Gas or vapor deposition of article forming material onto...

291564WL, 415200, 428593, 428598, F01D 2524, B32B 300

Patent

active

042809754

ABSTRACT:
A method for constructing a turbine shroud structure includes providing a metal substrate with a plurality of pegs extending therefrom. A ceramic sealing layer of zirconium oxide with about 20 weight percentage magnesium is applied to the peg-metal substrate structure. Intermediate bonding layers may be applied between the ceramic sealing layer and the peg-metal substrate structure. The ceramic sealing layer is then heat treated to a temperature of 1100.degree. C. to increase the rub wear of the ceramic sealing layer and to reduce the thermal stress therein.

REFERENCES:
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patent: 3339933 (1967-09-01), Foster
patent: 3519202 (1970-07-01), Davis
patent: 3843278 (1974-10-01), Torell
patent: 3975165 (1976-08-01), Elbert el al.
patent: 4087199 (1978-05-01), Hemsworth et al.
Shiembob, L. T., Development of A Plasma Sprayed Ceramic Gas Path Seal for High Pressure Turbine Applications, NTIS N77-25534, Apr. 1977.

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