Coatings and a method of optically detecting corrosion in...

Details Coatings and a method of optically detecting corrosion in... Coatings and a method of optically detecting corrosion in...

2004-08-18

2010-12-28

Porta, David P (Department: 2884)

Radiant energy

Luminophor irradiation

Methods

Reexamination Certificate

active

07858952

ABSTRACT:
A method for optically detecting hot corrosion of a thermal barrier coating (TBC), comprising: providing a TBC which includes an indicator material which has an optical emission which is altered by corrosion of the coating; irradiating the TBC with an excitation beam of light; receiving an optical emission from the TBC; obtaining a detection signal for the optical emission; and analysing the detection signal to identify one or more predeterminable spectral characteristics and evaluate the amount of corrosion of the TBC. Detection apparatus for optically detecting the corrosion of a thermal barrier coating with the mentioned method, and coating to be inspected by said apparatus and method.

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Feist et al., “Oxygen Quenching of Phosphorescence From Thermographic Phosphors”, Mar. 2003, Measurement Science and Technology 14 N17-N20, pp. 1-4.
Schulz et al., “The Thermocyclic Behavior of Differently Stabilized and Structured EB-PVD TBCs”, Oct. 1997, JOM Research Summary vol. 49, No. 10, pp. 1-10.

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