Abstract: A detection system for detecting an optical signal from a luminescent material applied to or incorporated within an object comprises: at least one light source which generates light, as excitation light, for illuminating at least a region of the object; at least one detector which detects light, as collection light, from the object when illuminated by the excitation light and provides an output signal having a signal intensity in response to an intensity of the collection light; and a controller which is adapted to control the output signal to have a signal intensity within a predetermined range or at substantially a constant value, or post-process the output signal to extract the output signal at a signal intensity within a predetermined range or at substantially a constant value.

Abstract: A component coated with a thermal barrier coating (TBC), wherein the TBC includes an outer surface layer and at least one underlying layer, wherein the outer surface layer has a thickness of not more than 50% of a thickness of the TBC, has a lower average porosity than the at least one underlying layer and includes an additional phase therewithin.

Abstract: A multi-functional material composition comprising a zirconia host and containing a luminescent lanthanide oxide additive, in particular dysprosia (Dy2O3), wherein the lanthanide oxide additive is effective both in stabilizing the zirconia and providing for luminescent temperature sensing, and a method of determining a remaining useful life-time for the luminescent material composition from the proportion of a monoclinic phase (m) in the material composition.

Abstract: A system for and method of determining thermal history of components which are subjected to high-temperature environments, such as in boilers, fuel cells, furnaces, engines and gas turbines, and temperature-monitoring materials and coatings for use in such a system and method.