Method for non-destructive evaluation of ceramic coatings
US9488470B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 14, 2014 |
| Grant date | Nov 8, 2016 |
| Priority date | — |
| Expiry date | May 23, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/303
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.