Photoelasticity for sub-surface stress measurements in structural ceramics and ceramic coating systems.
Lead Research Organisation:
Cranfield University
Department Name: Sch of Aerospace, Transport & Manufact
Abstract
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Publications
Isern L
(2021)
Non-destructive thickness measurement of thermal barrier coatings using terahertz radiation
in Emergent Materials
Waddie AJ
(2020)
Terahertz optical thickness and birefringence measurement for thermal barrier coating defect location.
in Optics express
| Description | Teraherz radiation can be used to detect changes in the microstructure of EB-PVD thermal barrier coatings that results from high temperature thermal aging of such coating systems. |
| Exploitation Route | These observations could be used as part of a structural health monitoring stratergy for TBC systems. Contact has been made with Rolls-Royce to provide coated turbine blade samples to assess this. |
| Sectors | Aerospace, Defence and Marine,Manufacturing, including Industrial Biotechology |
| Description | Discussions have commenced with Rolls-Royce plc over the use of Terahertz radiation for the non-destructive inspection of Thermal Barrier Coatings. Some preliminary trials have started. Rolls-Royce has supplied blades for measurement at Heriot-Watt University, our partner in this project. |
| First Year Of Impact | 2020 |
| Sector | Aerospace, Defence and Marine,Transport |
| Impact Types | Economic |
| Description | Multi-Layered Thermal Barrier Coatings - 2020 |
| Amount | £221,000 (GBP) |
| Funding ID | STC33116 |
| Organisation | Rolls Royce Group Plc |
| Sector | Private |
| Country | United Kingdom |
| Start | 11/2020 |
| End | 12/2021 |
| Description | Multi-layered CMAS Resistant Thermal Barrier Coatings |
| Amount | £79,896 (GBP) |
| Funding ID | STC 32729 |
| Organisation | Rolls Royce Group Plc |
| Sector | Private |
| Country | United Kingdom |
| Start | 06/2018 |
| End | 12/2018 |
| Description | Multi-layered CMAS Resistant Thermal Barrier Coatings (phase 2) |
| Amount | £62,180 (GBP) |
| Funding ID | STC 32872 |
| Organisation | Rolls Royce Group Plc |
| Sector | Private |
| Country | United Kingdom |
| Start | 04/2019 |
| End | 12/2019 |
| Description | Structured CMAS Resistant Thermal Barrier Coatings - 2022 |
| Amount | £364,900 (GBP) |
| Organisation | Rolls Royce Group Plc |
| Sector | Private |
| Country | United Kingdom |
| Start | 12/2021 |
| End | 11/2023 |
| Description | Collaboration with Heriot Watt University |
| Organisation | Heriot-Watt University |
| Country | United Kingdom |
| Sector | Academic/University |
| PI Contribution | Cranfield University's contribution to this collaborative programme 'Manufacturing with Light' is the manufacture of EB-PVD thermal barrier coatings and bond coat systems, their aging at temperature to produce part-life microstructures and the modelling of life duration, |
| Collaborator Contribution | Heriot Watt's contribution is the analysis and characterisation of the TBC systems, using terahertz radiation to determinine if defects are generated during thermal aging and to measure the stress optic coefficient for these thermal barrier coatongs and how they change with high temperature thermal exposure. |
| Impact | Research is still on-going. |
| Start Year | 2016 |
| Description | Rolls Royce Plc |
| Organisation | Rolls Royce Group Plc |
| Country | United Kingdom |
| Sector | Private |
| PI Contribution | Discussions with Rolls-Royce over the use of THz radiation to non-destructively measure thermal barrier coating thickness. Provision of reference samples to Heriot-Watt University to calibrate measurements. |
| Collaborator Contribution | Rolls-Royce provided high pressure turbine blade samples to Heriot-Watt University. Cranfield University provided reference samples. Heriot-Watt University to measure thermal barrier coating thickness on commercial HP turbine blade samples, calibrated against thickness data provided by Cranfield University manufactured samples. |
| Impact | Non that are published. Validation exercise in progress. |
| Start Year | 2019 |