Thermal barrier coating wrap for turbine airfoil

Details Thermal barrier coating wrap for turbine airfoil Thermal barrier coating wrap for turbine airfoil

1999-02-01

2000-10-03

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Coating, specific composition or characteristic

416241R, 416 95, 415177, B32B 1800

Patent

active

061264008

ABSTRACT:
An airfoil having extended life due to reduction in stresses. The stresses are reduced by extending the thermal barrier coating below the radius between the outer band perimeter and the inner flow path surfaces and tapering the coating thickness. This additional tapered thermal barrier coating reduces the temperature gradient across a region already having high mechanical stresses resulting from geometric considerations thereby lowering thermally-induced stresses so that low cycle fatigue life is improved.

REFERENCES:
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patent: 5238752 (1993-08-01), Duderstadt et al.
patent: 5429478 (1995-07-01), Krizan et al.
patent: 5856027 (1999-01-01), Murphy
patent: 5981088 (1999-11-01), Bruce et al.
Brady, George S., and Clauser, Henry R. "Materials Handbook: 13th Edition", McGraw-Hill, Inc., New York, Dec. 1991, pp. 34-39.

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