Non-crystallising glass sealants for SOFC: Effect of Y2O3 addition
| Autor: | V.A. Eremin, Robert Steinberger-Wilckens, Maxim V. Ananyev, A. A. Raskovalov, D. A. Krainova, A.V. Kuzmin, N. S. Saetova |
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| Rok vydání: | 2020 |
| Předmět: |
02 engineering and technology
01 natural sciences Thermal expansion chemistry.chemical_compound GLASS SEALANTS Materials Chemistry SOFC Ceramic Composite material 010302 applied physics CERAMIC MATERIALS ZIRCONIA GLASS MICROSTRUCTURE EXPANSION YTTRIUM OXIDE 021001 nanoscience & nanotechnology Microstructure THERMAL EXPANSION Surfaces Coatings and Films Electronic Optical and Magnetic Materials THERMAL EXPANSION COEFFICIENTS visual_art visual_art.visual_art_medium JOINING ALUMINA CRYSTALLIZATION 0210 nano-technology SOLID OXIDE FUEL CELLS (SOFC) Materials science COBALT ALLOYS Alloy Oxide GLASS SEALANTS engineering.material CO ALLOYS ALUMINUM OXIDE SODIUM COMPOUNDS SEALING MICROSTRUCTURE 0103 physical sciences GLASS SEALANT JOINING OF CERAMICS SILICA Yttria-stabilized zirconia CRYSTALLISATION YTTRIA STABILIZED ZIRCONIA Process Chemistry and Technology Sealant NON-CRYSTALLISING SEALANT Amorphous solid chemistry Ceramics and Composites engineering YSZ CERAMICS MICROSTRUCTURE |
| Zdroj: | Ceram Int Ceramics International |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2019.10.266 |
| Popis: | The joining of ceramic and metal (interconnect) parts is one of the main challenges in the development of solid oxide fuel cells (SOFC). A promising approach to solving this problem is the use of glassy sealants. In this work, we investigated the effect of yttria additions on the properties of SiO2–Al2O3–CaO–Na2O–ZrO2–Y2O3 glass sealants. An increase in the concentration of yttria is shown to reduce the tendency of the glasses under study to crystallisation. A glass containing 4 wt% of Y2O3 is found to be amorphous, even after exposure at 850 °C for 100 h. Moreover, the defectiveness of the glass microstructure, after sealing, is found to decrease along with a growth in the Y2O3 concentration. The developed non-crystallising sealant was successfully applied for joining a YSZ ceramic and an Fe–Ni–Co alloy having the phase transition of around 500 °C. The use of the non-crystallising sealant allows us to join materials with very different thermal expansion coefficients and to avoid cracking under cooling, which might occur due to a large difference in thermal expansion coefficients. © 2019 Elsevier Ltd and Techna Group S.r.l. This study was financially supported by the RFBR project no. 17-58-10006. The research was partially performed using the facilities of the Shared Access Centre “Composition of Compounds” of IHTE UB RAS . The authors are grateful to Dr. S.V. Plaksin for XRD analysis, Dr. N. I. Moskalenko for AES analysis, A. S. Farlenkov for SEM analysis, and A. A. Solodyankin and V. A. Vorotnikov for their assistance in sample preparation. |
| Databáze: | OpenAIRE |
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