Mechanical and thermal characterization of a ceramic/glass composite seal for solid oxide fuel cells
| Autor: | Gene Arkenberg, Bodhayan Dev, Mark E. Walter, Scott L. Swartz |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Tape casting
Materials science Renewable Energy Sustainability and the Environment Composite number Compaction Oxide Energy Engineering and Power Technology Seal (mechanical) Thermal expansion chemistry.chemical_compound Acoustic emission chemistry visual_art visual_art.visual_art_medium Ceramic Electrical and Electronic Engineering Physical and Theoretical Chemistry Composite material |
| Zdroj: | Journal of Power Sources. 245:958-966 |
| ISSN: | 0378-7753 |
| Popis: | Solid oxide fuel cells (SOFCs) require seals that can function in harsh, elevated temperature environments. Comprehensive characterization and understanding of seals is needed for commercially viable SOFCs. The present research focuses on a novel ceramic/glass composite seal that is produced by roller compaction or tape casting of glass and ceramic powders and an organic binder. Upon heat treatment, micro-voids and surface anomalies are formed. Increased heating and cooling rates during the heat treatment resulted in more and larger voids. The first goal of the current research is to suggest an appropriate heating and cooling rate to minimize the formation of microstructural defects. After identifying an appropriate cure cycle, seals were thermally cycled and then characterized with laser dilatometry, X-ray diffraction, and sonic resonance. From these experiments the crystalline phases, thermal expansion, and elastic properties were determined. Subsequently compression testing with an acoustic emission (AE) sensor and post-test microstructural analysis were used to identify the formation of damage. By fully understanding the characteristics of this ceramic/glass composite seal, next generation seals can be fabricated for improved performance. |
| Databáze: | OpenAIRE |
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