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Steinberg, Lars and Mikulla, Christoph and Naraparaju, Ravisankar and Pavlov, Paul and Löffler, Markus and Schulz, Uwe and Leyens, Christoph (2022) Erosion behavior of CMAS/VA infiltrated EB-PVD Gd2Zr2O7 TBCs: Special emphasis on the effect of mechanical properties of the reaction products. WEAR, 506. Elsevier. doi: 10.1016/j.wear.2022.204450. ISSN 0043-1648.
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Abstract
Aero-engines operating in sand-laden (CMAS/CaO-MgO-Al2O3-SiO2) environments often encounter severe problems with thermal barrier coatings (TBCs) due to CMAS infiltration and erosion damage. This study focuses on a deeper understanding of the erosion behavior of CMAS-infiltrated EB-PVD Gd2Zr2O7 TBCs. The study includes isothermal infiltration of different CMAS and subsequent erosion tests at room temperature. In addition to the erosion behavior of the entire coating, the influence of different reaction products within the reaction layer on erosion failure was investigated by measuring the hardness and Young’s modulus of the individual phases using in-situ REM-Nanoindentation. It was found that a garnet layer above the reaction layer and spinel inclusions within a thick apatite/fluorite reaction layer, can improve the erosion resistance of this reaction layer by 30-40%. Furthermore, a correlation between the erosion behavior and the hardness vs. Young’s modulus relation, obtained from nanoindentation over the entire coating, was observed for a consistent microstructure.
| Item URL in elib: | https://elib.dlr.de/191222/ | ||||||||||||||||||||||||||||||||
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| Document Type: | Article | ||||||||||||||||||||||||||||||||
| Title: | Erosion behavior of CMAS/VA infiltrated EB-PVD Gd2Zr2O7 TBCs: Special emphasis on the effect of mechanical properties of the reaction products | ||||||||||||||||||||||||||||||||
| Authors: |
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| Date: | 12 July 2022 | ||||||||||||||||||||||||||||||||
| Journal or Publication Title: | WEAR | ||||||||||||||||||||||||||||||||
| Refereed publication: | Yes | ||||||||||||||||||||||||||||||||
| Open Access: | Yes | ||||||||||||||||||||||||||||||||
| Gold Open Access: | No | ||||||||||||||||||||||||||||||||
| In SCOPUS: | Yes | ||||||||||||||||||||||||||||||||
| In ISI Web of Science: | Yes | ||||||||||||||||||||||||||||||||
| Volume: | 506 | ||||||||||||||||||||||||||||||||
| DOI: | 10.1016/j.wear.2022.204450 | ||||||||||||||||||||||||||||||||
| Publisher: | Elsevier | ||||||||||||||||||||||||||||||||
| ISSN: | 0043-1648 | ||||||||||||||||||||||||||||||||
| Status: | Published | ||||||||||||||||||||||||||||||||
| Keywords: | Gd2Zr2O7; CMAS; TBC, Erosion, EB-PVD | ||||||||||||||||||||||||||||||||
| HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||||||||||||||||||
| HGF - Program: | Aeronautics | ||||||||||||||||||||||||||||||||
| HGF - Program Themes: | Clean Propulsion | ||||||||||||||||||||||||||||||||
| DLR - Research area: | Aeronautics | ||||||||||||||||||||||||||||||||
| DLR - Program: | L CP - Clean Propulsion | ||||||||||||||||||||||||||||||||
| DLR - Research theme (Project): | L - Advanced Materials and New Manufacturing Technologies | ||||||||||||||||||||||||||||||||
| Location: | Köln-Porz | ||||||||||||||||||||||||||||||||
| Institutes and Institutions: | Institute of Materials Research > High Temperature and Functional Coatings | ||||||||||||||||||||||||||||||||
| Deposited By: | Naraparaju, Dr Ravisankar | ||||||||||||||||||||||||||||||||
| Deposited On: | 30 Nov 2022 09:05 | ||||||||||||||||||||||||||||||||
| Last Modified: | 30 Nov 2022 09:05 |
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