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Method for non-destructive evaluation of ceramic coatings

United States Patent

9,488,470
November 8, 2016
View the Complete Patent at the US Patent & Trademark Office
A method for evaluating the condition of a ceramic coating deposited on a substrate comprising illuminating the ceramic coating with light, measuring the intensity of light returned from the ceramic coating as function of depth in the coating and transverse position on the coating, and analyzing the measured light intensities to obtain one or more of intensity of the light returned from the exposed coating surface relative to the intensity of light returned from the coating/substrate interface, intensity of the light returned from the coating/substrate interface relative to the intensity of light returned from the bulk of the ceramic coating, determination of roughness at the exposed surface of the ceramic coating, and determination of roughness of the interface between the ceramic coating and underlying bond coat or substrate.
Peterson; Kristen A. (Santa Fe, NM), Rosen; Elias P. (Chapel Hill, NC), Jordan; Eric H. (Storrs-Mansfield, CT), Shahbazmohamadi; Sina (New York, NY), Vakhtin; Andrei B. (New Mexico, NM)
UNIVERSITY OF CONNETICUT (Farmington, CT), SOUTHWEST SCIENCES INCORPORATED (Sante Fe, NM)
14/ 180,914
February 14, 2014
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with government support under Contract No. DE-SC0001872 awarded by the U.S. Department of Energy. The government has certain rights in the invention.