Prestressed ceramic coatings

Details Prestressed ceramic coatings Prestressed ceramic coatings

1983-03-10

1985-03-05

O'Keefe, Veronica

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

428535, 428547, 428552, 428555, 428556, 428610, 428633, 428678, 428679, 428680, 428681, C03C 1706

Patent

active

045031304

ABSTRACT:
Structure coated with graded ceramic material and methods of coating application are disclosed. Techniques for maintaining low stress to strength ratios across the depth of the coating are discussed.
In one particular structure the coating is applied to a metal substrate (12) and comprises a metallic bond coat (14), a first interlayer (16) of metal/ceramic material, a second interlayer (18) of metal/ceramic material having an increased proportion of ceramic and an all ceramic layer. Modulation of the metal substrate temperature during the coating process establishes a desired residual stress pattern in the part.

REFERENCES:
patent: 4109031 (1978-08-01), Marscher
Fairbanks, J. W., et al., Ed; Proceedings of 1974 Gas Turbine Materials in the Marine Environment Conf. pp. 429-456, (6/75).
Bunshah, R. F., "High Rate Evaporation/Deposition Processes of Metals, Alloys and Ceramics for Vacuum Metallurgical Applications, J. Vac. Sci. Tech. vol. 11, pp. 814-819, (1974).

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