advanced coatings for challenging environments

Purpose and goal

The project aims are to improve the performance of existing coatings for protecting hot components in gas turbines and to develop corresponding lifing tools. Cooperation between the project partners has been successful. 6 metallic coatings and 7 TBC systems were studied and coatings of best performance in different service environments were identified. A life model was adapted for predicting TCF-life of APS TBCs and ongoing model validation is expected to complete soon. The project goals are fulfilled.

Expected results and effects

Metallic coatings and TBC systems were prepared and studied. Tests and analyses were focused on long term oxidation and corrosion behavior of 6 MCRAlX coatings, TCF performance of 3 APS TBC systems and corrosion resistance of 4 SPS TBC systems. An existing TCF-life model was further developed for TCF-life prediction of APS TBCs. A considerable number of scientific papers have been generated. The results are important not only for implementation of the investigated coatings for gas turbine applications but also for development of new high temperature coatings of better performance.

Planned approach and implementation

The project work has been carried out through close collaboration between Beijing General Research Institute of Mining and Metallurgy, Siemens Industrial Turbomachinery in Finspång and the Division of Engineering Materials at Linköping University. Project tasks have been set-up in work packages in which the responsibility and participation of the partners have been clearly specified. Physical project meetings and regular on-line meetings as well as intensive exchange of information and results via e-mail communications have been important for the successful collaboration.