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Naraparaju, Ravisankar and Förster, Jan Erik (2024) Development of oxidation protective coatings on ZrB2 based UHTC materials using magnetron sputtering method. ADVANCED CERAMICS AND APPLICATION XII New Frontiers in Multifunctional Material Science and Processing, 2024-09-18 - 2024-09-20, Belgrad, Serbia.
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Abstract
The oxidation of ZrB2 based Ultra-High Temperature Ceramics (UHTCs) leads to the formation of liquid B2O3 and porous ZrO2. Increased evaporation of B2O3 above 1500°C restricts the usage of ZrB2 for long term applications. Overlay coatings for oxidation protection has been explored for the first-time using magnetron sputtering. Coatings such as HfO2, Gd2O3 and metallic Nb are applied on top of ZrB2 and high temperature oxidation tests up to 1700°C are conducted for various times. The application of protective coatings has proven the increased oxidation resistance of ZrB2 at the studied temperatures and times. The underpinning oxidation mechanisms are understood and identified as 1) Formation of a liquid solution with B2O3 and decreasing its evaporation rate and 2) Densification of ZrO2 scale by means of liquid phase sintering or solid solution formation
| Item URL in elib: | https://elib.dlr.de/210015/ | ||||||||||||
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| Document Type: | Conference or Workshop Item (Speech) | ||||||||||||
| Title: | Development of oxidation protective coatings on ZrB2 based UHTC materials using magnetron sputtering method | ||||||||||||
| Authors: |
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| Date: | 2024 | ||||||||||||
| Refereed publication: | Yes | ||||||||||||
| Open Access: | No | ||||||||||||
| Gold Open Access: | No | ||||||||||||
| In SCOPUS: | No | ||||||||||||
| In ISI Web of Science: | No | ||||||||||||
| Status: | Published | ||||||||||||
| Keywords: | UHTC, PVD coating, Oxidation | ||||||||||||
| Event Title: | ADVANCED CERAMICS AND APPLICATION XII New Frontiers in Multifunctional Material Science and Processing | ||||||||||||
| Event Location: | Belgrad, Serbia | ||||||||||||
| Event Type: | international Conference | ||||||||||||
| Event Start Date: | 18 September 2024 | ||||||||||||
| Event End Date: | 20 September 2024 | ||||||||||||
| 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: | 05 Dec 2024 10:47 | ||||||||||||
| Last Modified: | 05 Dec 2024 10:47 |
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