Durable Thermal Barrier Coatings
SCS have identified a coating composition based on luminescence dopants that has shown superior durability in comparison to a standard thermal barrier coating (TBC) This could enable higher operating temperatures which can improved efficiency and reduce maintenance costs.
SCS has developed an intelligent coating imaging system which enables maintenance engineers to quickly assess damage to a coated surface in high resolution with wide viewing angles. This technology can be applied in areas where the thickness of a protection layer is critical for example in manufacturing processes or in gas turbines.
Online temperature measurement
Online temperature measurement – when temperature transients are important SCS coatings can also be produced so that there is no thermal history effect! In this case, the luminescence in the coatings changes reversibly with temperature so that measurements are recorded while the material is at temperature. On-line phosphorescence temperature measurements can be useful when other technologies such as infrared detectors are disturbed by the vicinity of combustion flames or unknown and changing surface emissivity. This technique, termed phosphor thermometry, has been known for many years. Southside Thermal Sciences (now New STS Ltd) has pioneered its practical application on gas turbines using patented robust coatings and applied the technology successfully in the hot section of a Rolls-Royce Viper 201 engine.Sensor Coating Systems spun out of Southside Thermal Sciences in 2012. However, the expertise to apply the on-line temperature technology is still in Sensor Coating Systems Ltd. The application of the on-line temperature system was published in peer reviewed scientific journals and presented at several conferences. The work was acknowledged with several best paper awards and the John P Davies award from the ASME Turbo Expo in 2014.
- Sensing material was applied using production line atmospheric plasma spray (APS) facilities.
- Compatible with thermal barrier coatings
- Newly developed and patented observation optics successfully applied following rotating turbine blades.
Measurements carried out on a Rolls-Royce Viper 201 jet engine:
- Nozzle guide vanes
- Combustion chamber wall (looking through a flame)
- Rotating turbine blade (at ca 350m/s speed)
- Sub-surface measurements performed close to the bondcoat.
Contact SCS if you are interested into a specific application.