A facile in-situ strategy to fabricate lightweight carbon fiber/silicone-phenolic aerogel composites with superior toughness and ablation performance.
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| Title: | A facile in-situ strategy to fabricate lightweight carbon fiber/silicone-phenolic aerogel composites with superior toughness and ablation performance. |
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| Authors: | Wang, Wenkai1 (AUTHOR), Xu, Wenjie1 (AUTHOR), Jia, Xianfeng2 (AUTHOR), Zhang, Fuhang3 (AUTHOR), Cao, Yinping3 (AUTHOR), Ma, Cheng1 (AUTHOR), Wang, Jitong1 (AUTHOR), Qiao, Wenming1 (AUTHOR) qiaowm@ecust.edu.cn, Ling, Licheng1 (AUTHOR) |
| Source: | Journal of Materials Science. Oct2024, Vol. 59 Issue 39, p18488-18498. 11p. |
| Subjects: | Flexural modulus, Ablative materials, Astronautics, Thermal conductivity, Thermal stability |
| Abstract: | The development of lightweight carbon fiber/phenolic ablator plays a vital role in advancements of space technology. However, the complex fabrication process and inherent brittleness of ablators impede its further progress. Herein, we fabricated a high-performance carbon fiber/silicone-phenolic aerogel (CFSP) composite through a facile in-situ strategy, which exhibits lightweight nature (0.25–0.28 g/cm3), low thermal conductivity (0.054–0.056 W/(m·K)) and thermal stability. Meanwhile, the as-designed composites effectively addressed the disadvantage of brittleness that exhibited a fracture strain of 34.32% and a flexural modulus of 4.07 MPa, which was a significant improvement compared with the toughness of the unmodified composite (15.60%, 21.44 MPa, respectively). Notably, in the oxyacetylene test, the linear ablation rates show a great decline from 0.381 mm/s to 0.227 mm/s with the increase in silicone contents. Therefore, the CFSP composite is a competitive candidate for the thermal protection material of the next generation of hypersonic vehicles. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | The development of lightweight carbon fiber/phenolic ablator plays a vital role in advancements of space technology. However, the complex fabrication process and inherent brittleness of ablators impede its further progress. Herein, we fabricated a high-performance carbon fiber/silicone-phenolic aerogel (CFSP) composite through a facile in-situ strategy, which exhibits lightweight nature (0.25–0.28 g/cm3), low thermal conductivity (0.054–0.056 W/(m·K)) and thermal stability. Meanwhile, the as-designed composites effectively addressed the disadvantage of brittleness that exhibited a fracture strain of 34.32% and a flexural modulus of 4.07 MPa, which was a significant improvement compared with the toughness of the unmodified composite (15.60%, 21.44 MPa, respectively). Notably, in the oxyacetylene test, the linear ablation rates show a great decline from 0.381 mm/s to 0.227 mm/s with the increase in silicone contents. Therefore, the CFSP composite is a competitive candidate for the thermal protection material of the next generation of hypersonic vehicles. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 00222461 |
| DOI: | 10.1007/s10853-024-10282-7 |
