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US 5,687,679 AGranted
Multiple nanolayer coating system
AssigneeUnited Technologies Corporation
InventorsRichard S. Mullin, William P. Allen, Maurice L. Gell, Richard H. Barkalow, Allan A. Noetzel, John W. Appleby, Abdus S. Khan
Life of this patent
Estimating the term…
Abstract
A thermal barrier coating for high temperature applications has improved resistance to heat flow. The coating comprises a large number of these (nanometer scale) layers separated by interfaces which are effective in retarding heat flow. The coating material will typically be oxide based ceramics and the coating has particular applications in gas turbine engines.
Claims5
An air cooled gas turbine component which comprises:
- a. a superalloy substrate having internal cooling passages for the flow of cooling air,
- b. a thermal barrier coating on said substrate, comprising:
- at least 10 layers of ceramic, each layer being from about 10 angstroms to 10,000 angstroms in thickness, each layer being separated from adjacent layers by a stable interface with the total thickness of the coating being at least 1 mil (25 microns).
Dependencies are inferred from the claim text.