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US 6,207,295 B1Granted
Article with tailorable high temperature coating
AssigneeGeneral Electric Company
InventorsWilliam R. Stowell, Ching-Pang Lee, John F. Ackerman, George A. Durgin, Robert W. Harris
Life of this patent
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Abstract
A coated article comprises a substrate, an inner environmental resistant coating portion including Al on the substrate, and an outer heat energy reflecting and oxygen diffusion inhibiting coating portion outward of the inner portion. The outer coating portion is multi-layer, comprising 6-48 discrete stacked layers and a total outer coating portion thickness in the range of about 2.5-25 microns.
Claims6
A coated article comprising:
- a substrate of an alloy based on at least one element selected from the group consisting of Ni and Co;
- an inner environmental resistant coating portion including Al on the substrate;
- and,
- an outer heat energy reflecting and oxygen diffusion inhibiting coating portion, the outer coating portion:
- a. being multi-layered;
- b. comprising 6-48 stacked layers;
- and,
- c. having a total thickness in the range of about 2.5-25 microns;
- the outer coating portion comprising alternating layers of:
- a. at least one high index material selected from the group consisting of Ta2O5, TiO2, HfO2, NbO, and Y2O5;
- and,
- b. at least one low index material selected from the group consisting of SiO2 and Al2O3.
9 more elements
A coated gas turbine engine turbine blading member including an airfoil, the airfoil comprising:
- a Ni base superalloy substrate;
- an inner environmental resistant coating portion including Al on the substrate, the inner coating portion being selected from the group consisting of aluminide, M—Cr—Al, and Pt—Al coatings;
- and,
- an outer heat energy reflecting and oxygen inhibiting coating portion on the inner portion, the outer coating portion:
- a. being multi-layered comprising 20-30 stacked layers, each layer having a thickness in the range of about 0.05-1.2 microns;
- and,
- b. having a total thickness in the range of about 7.5-15 microns.
4 more elements
Dependencies are inferred from the claim text.