Microstructure and property evolution of PIM-processed Fe-30Cr alloys for SOFC/SOEC interconnectors under simulated operational conditions
Solid oxide fuel cells (SOFCs) and electrolyzer cells (SOECs) require advanced interconnector materials that can withstand extreme conditions while ensuring both efficiency and durability. Although Crofer 22 has been widely studied, its lack of commercial powder limits its use in Powder Injection Mo...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universidad de Castilla-La Mancha |
| Repositorio: | RUIdeRA. Repositorio Institucional de la UCLM |
| OAI Identifier: | oai:ruidera.uclm.es:10578/47363 |
| Acceso en línea: | https://doi.org/10.1016/j.matchar.2025.115945 https://hdl.handle.net/10578/47363 |
| Access Level: | acceso abierto |
| Palabra clave: | SOFC/SOEC interconnectors Powder injection moulding (PIM) Crofer 30 In-service performance Oxidation resistance Hydrogen embrittlement |
| Sumario: | Solid oxide fuel cells (SOFCs) and electrolyzer cells (SOECs) require advanced interconnector materials that can withstand extreme conditions while ensuring both efficiency and durability. Although Crofer 22 has been widely studied, its lack of commercial powder limits its use in Powder Injection Moulding (PIM), a promising manufacturing route for cost-effective, high-performance interconnectors with complex geometries. In contrast, Crofer 30 is commercially available in powder form, enabling full utilization of PIM, yet its in-service performance remains untested. This study addresses this gap by evaluating its microstructure evolution, oxidation resistance, hydrogen embrittlement susceptibility, and mechanical integrity under simulated SOFC conditions. PIM-processed Crofer 30 exhibits a suitable thermal expansion coefficient and maintains competitive electrical conductivity due to the formation of a fine, stable chromia layer after 200 h in air. While prolonged high-temperature exposure enhances hardness without compromising ductility, hydrogen exposure induces embrittlement. Overall, this work positions Crofer 30 as a viable alternative to Crofer 22 for next-generation SOFC/SOEC interconnectors, supporting the development of more durable and efficient energy systems through advanced designs and accelerating the transition to green energy technologies. |
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