X-ray or gamma ray systems or devices – Specific application – Absorption
Reexamination Certificate
2007-11-20
2007-11-20
Yun, Jurie (Department: 2882)
X-ray or gamma ray systems or devices
Specific application
Absorption
C250S390020, C250S358100
Reexamination Certificate
active
11243370
ABSTRACT:
Methodologies for non-destructively inspecting and characterizing micro-structural features in a thermal barrier coating (TBC) on a component, wherein the micro-structural features define pores and cracks, if any, in the TBC. The micro-structural features having characteristics at least in part based on a type of process used for developing the TBC and affected by operational thermal loads to which a TBC is exposed. In one embodiment, the method allows detecting micro-structural features in a TBC, wherein the detecting of the micro-structural features is based on energy transmitted through the TBC, such as may be performed with a micro-feature detection system20. The transmitted energy is processed to generate data representative of the micro-structural features, such as may be generated by a controller26. The data representative of the micro-structural features is processed (e.g., by a processor30) to determine at least one of the following: volumetric porosity information for the TBC and variation in the characteristics of the micro-structural features over a thickness of the TBC. Based on the results of the data processing, information is generated regarding at least one of the following: a present condition of the thermal barrier coating and a future likely condition of the thermal barrier coating. In another embodiment, one can estimate a level of thermal load to which the thermal barrier coating has been exposed.
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Kulkarni Anand A.
Subramanian Ramesh
Siemens Power Generation, Inc.
Yun Jurie
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