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Guijosa-Garcia, Cynthia Y. and Mechnich, Peter and Schulz, Uwe and Naraparaju, Ravisankar (2025) Reactivity of single, equiatomic and non-equiatomic rare-earth disilicates with CMAS at high temperature. Ceramics International. Elsevier. doi: 10.1016/j.ceramint.2025.08.437. ISSN 0272-8842.
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Official URL: https://www.sciencedirect.com/science/article/pii/S0272884225042452?via%3Dihub
Abstract
Multi-component RE2Si2O7 have gained scientific interest due to their combination of improved properties which can be used for T/EBC (thermal and environmental barrier coating) application. This work addresses the role of Sc3+, Lu3+, Yb3+, Er3+, Y3+, and Ho3+ cations in the reactivity with CMAS of single and multi-component rareearth silicates having either equiatomic or non-equiatomic RE contents. Thermochemical powder interactions were investigated at 1350 and 1400 ◦C through the reaction products. The reaction products include RE2Si2O7, apatite (Ca2RE8(SiO4)6O2) and pyroxene-type (Ca(Mg,Fe)[(Si,Al)2O6]) phases. The observed trends indicate that Sc3+, Lu3+, and Yb3+ are slowly dissolved in CMAS without causing any crystalline phase formation, meanwhile, Er3+, Y3+, and Ho3+ rapidly crystallized the apatite phase. Non-equiatomic multi-component materials can be designed to tune physical, mechanical, environmental, and other relevant properties depending on the con centration of RE elements.
| Item URL in elib: | https://elib.dlr.de/217639/ | ||||||||||||||||||||
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| Document Type: | Article | ||||||||||||||||||||
| Title: | Reactivity of single, equiatomic and non-equiatomic rare-earth disilicates with CMAS at high temperature | ||||||||||||||||||||
| Authors: |
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| Date: | 1 September 2025 | ||||||||||||||||||||
| Journal or Publication Title: | Ceramics International | ||||||||||||||||||||
| Refereed publication: | Yes | ||||||||||||||||||||
| Open Access: | Yes | ||||||||||||||||||||
| Gold Open Access: | No | ||||||||||||||||||||
| In SCOPUS: | Yes | ||||||||||||||||||||
| In ISI Web of Science: | Yes | ||||||||||||||||||||
| DOI: | 10.1016/j.ceramint.2025.08.437 | ||||||||||||||||||||
| Publisher: | Elsevier | ||||||||||||||||||||
| ISSN: | 0272-8842 | ||||||||||||||||||||
| Status: | Published | ||||||||||||||||||||
| Keywords: | T/EBC Disilicates Multi-component Non-equiatomic CMAS | ||||||||||||||||||||
| 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 Institute of Materials Research > Structural and Functional ceramics | ||||||||||||||||||||
| Deposited By: | Garcia, Cynthia Yanel Guijosa | ||||||||||||||||||||
| Deposited On: | 31 Oct 2025 08:46 | ||||||||||||||||||||
| Last Modified: | 31 Oct 2025 08:46 |
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