Smart coating system with chemical taggants for coating condition assessment
AssigneeGeneral Electric Company
InventorsJi-Cheng Zhao, James Anthony Ruud, John Eric Tkaczyk, Ann Melinda Ritter, Melvin Robert Jackson, Jerome Johnson Tiemann
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Abstract
A on-line method is provided for detecting wear and/or damage to gas turbine parts. Preferred embodiments of the invention provide a gas turbine comprising parts with smart coatings and collection and detection means to measure wear and erosion of gas turbine parts. In other preferred embodiments, smart coatings are provided comprising chemical taggants that can be collected and detected downstream, thus providing an on-line or in situ evaluation technology for wear and damage to gas turbine parts.
Claims33
An on-line method of assessing wear and/or damage to gas turbine parts, comprising the steps of:
- (a) providing one or more gas turbine parts with a coating comprising a taggant, said coating comprising at least one of an environmental coating, a thermal barrier coating, and a bond coat;
- (b) collecting particles of an exhaust gas stream which passed over a part provided in step (a) to provide a particulate containing fraction;
- and
- (c) analyzing the particulate containing fraction for the taggant, whereby the presence of which indicates at least one of wear or damage to the gas turbine part.
A gas turbine, comprising:
- (a) one or more gas turbine parts provided with a coating comprising a taggant, said coating comprising at least one of an environmental coating, a thermal barrier coating, and a bond coat;
- (b) a exhaust gas collector in fluid communication with the gas turbine parts, whereby the collector samples a portion of an exhaust gas which passed over the coated gas turbine parts;
- and
- (c) an exhaust particle separator connected to gas exhaust collector, whereby the separator separates particles from the exhaust gas.
A part for a gas turbine comprising:
- a) a turbine component substrate;
- and
- b) an environmental resistant coating applied on the turbine component substrate;
- and
- wherein the environmental coating or a coating/substrate interface comprises a taggant selected from the group consisting of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Re, Ru, Pd, Pt, and Au.
A part for a gas turbine comprising:
- a) a turbine component substrate;
- b) a bond coat provided on the turbine component substrate;
- and
- c) a thermal barrier coat (TBC) applied over the bond coat,
- wherein the TBC or a TBC interface comprises a taggant selected from the group consisting of Sr, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, and the bond coat or a bond coat interface comprises a taggant selected from the group consisting of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Re, Ru, Pd, Pt, and Au, and wherein the TBC or TBC interface taggant is different from the bond coat or bond coat interface taggant.
A gas turbine, comprising:
- (a) one or more gas turbine parts provided with a coating comprising a taggant, said coating comprising at least one of an environmental coating, a thermal barrier coating, and a bond coat;
- (b) a collector means for sampling a portion of an exhaust gas which passed over the coated gas turbine parts, said collector means in fluid communication with said turbine parts;
- and
- (c) a separator means for separating particles from the exhaust gas, said separator means connected to said collector means.
Dependencies are inferred from the claim text.