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| Abstract No.: |
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Scheduled at:
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Wednesday, May 21, 2014, Hall H1 & H2 11:10 AM
Aviation Industry 1
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| Title: |
Highly segmented thermal barrier coatings by atmospheric and suspension plasma spraying
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| Authors: |
Robert Vaßen* / Forschungszentrum Jülich GmbH, Germany
Matthias Karger/ Forschungszentrum Jülich GmbH, IEK-1, Germany
Hans-Peter Bossmann/ Alstom Power, Switzerland
Federico Cernuschi/ RSE spl, Italy
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| Abstract: |
Within an European funded project highly segmented and columnar thermal barrier coatings (TBCs) have been developed. Within the present paper the manufacture of such segmented coatings by atmospheric plasma spraying and suspension plasma spraying will be described. For both processes two different feedstocks have been used. Rather hot deposition conditions in combination with high passage thickness have been applied especially for the APS process to obtain a high degree of segmentation cracks without detrimental delamination paths. The optimized spraying conditions lead to segmentation crack densities of about 8 cracks / mm for both the APS and the SPS process. The performance of the coatings have been evaluated in different test beds, here mainly the results of thermal cyclic tests also in comparison with standard APS and EB-PVD coatings will be discussed. Finally, the APS technology for highly segmented coatings was applied for the coating of vanes of stationary gas turbines. It could be demonstrated that high segmentation crack densities could also be obtained on complex shaped, real components.
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