Microstructure development during pyrolysis of wet-laid nonwoven-based CFRP for the manufacturing of ceramic matrix composites (CMC)
Fiber reinforcement plays a critical role in defining the properties of ceramic matrix composites (CMCs). Among various textile technologies, wet-laid nonwovens have gained attention because previous studies have shown that their method of production significantly influences ceramic formation during...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-09-01
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| Series: | Open Ceramics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666539525001026 |
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| Summary: | Fiber reinforcement plays a critical role in defining the properties of ceramic matrix composites (CMCs). Among various textile technologies, wet-laid nonwovens have gained attention because previous studies have shown that their method of production significantly influences ceramic formation during liquid silicon infiltration (LSI) [1]. This study investigates in-situ microstructural evolution during pyrolysis using microscopy in a small-scale furnace. Two carbon fiber-reinforced polymer (CFRP) types were examined: single filament and fiber bundle wet-laid nonwovens. Thermal analysis revealed distinct behaviors. In single filament samples, key cracking occurred around 610 °C due to matrix weakening and stress release. In contrast, fiber bundle samples showed crack formation at 150–300 °C and above 700 °C, driven by outgassing, partial matrix detachment, and matrix shrinkage. These mechanisms result in SiC-rich structures for single filament reinforced materials and carbon-rich, short fiber composites for bundle reinforced materials. The findings support tailored reinforcement design for application-specific CMC properties. |
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| ISSN: | 2666-5395 |