This title appears in the Scientific Report :
2020
Please use the identifier:
http://hdl.handle.net/2128/25251 in citations.
Please use the identifier: http://dx.doi.org/10.1002/adem.202000087 in citations.
Improved Adhesion of Different Environmental Barrier Coatings on Al$_{2}$O$_{3}$/Al$_{2}$O$_{3}$ -Ceramic Matrix Composites
Improved Adhesion of Different Environmental Barrier Coatings on Al$_{2}$O$_{3}$/Al$_{2}$O$_{3}$ -Ceramic Matrix Composites
In high‐temperature combustion atmospheres, well‐adhering environmental barrier coatings (EBCs) are required to protect the underlying ceramic matrix composites (CMCs) from corrosion. Herein the adhesion mechanisms of three different coatings produced by atmospheric plasma spraying (APS) on an Al2O3...
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Personal Name(s): | Gatzen, Caren (Corresponding author) |
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Mack, Daniel Emil / Guillon, Olivier / Vaßen, Robert | |
Contributing Institute: |
Werkstoffstruktur und -eigenschaften; IEK-2 Werkstoffsynthese und Herstellungsverfahren; IEK-1 |
Published in: | Advanced engineering materials, 22 (2020) 6, S. 2000087 - |
Imprint: |
Frankfurt, M.
Deutsche Gesellschaft für Materialkunde
2020
|
DOI: |
10.1002/adem.202000087 |
Document Type: |
Journal Article |
Research Program: |
Methods and Concepts for Material Development |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1002/adem.202000087 in citations.
In high‐temperature combustion atmospheres, well‐adhering environmental barrier coatings (EBCs) are required to protect the underlying ceramic matrix composites (CMCs) from corrosion. Herein the adhesion mechanisms of three different coatings produced by atmospheric plasma spraying (APS) on an Al2O3/Al2O3‐CMC are investigated. In particular, the influence of surface structuring by laser ablation prior to coating production is investigated. Y2O3, yttria‐stabilized zirconia (YSZ), and Gd2Zr2O7 are chosen as potential EBCs. The coating adhesion on CMC‐substrates with and without surface structuring is analyzed by furnace cycling, pull‐adhesion tests, and burner‐rig tests with gradient. Special interest is paid to the interactions at the coating–substrate interface before and after heat treatment and their effect on the coating adhesion and lifetime. Two different adhesion mechanisms are found: adhesion promoted by chemical reaction and adhesion promoted by mechanical interlocking. |