Tailoring microstructures of carbon fiber reinforced carbon aerogel-like matrix composites by carbonization to modulate their mechanical properties and thermal conductivities
文献类型：期刊论文
| 作者 | Ma, Jian3,4; Li, Jian4; Guo, Penglei3,4; Pang, Shengyang4; Hu, Chenglong4; Zhao, Rida3,4; Tang, Sufang1,4; Cheng, Hui-Ming2 |
| 刊名 | CARBON
 |
| 出版日期 | 2022-08-30 |
| 卷号 | 196页码:807-818 |
| ISSN号 | 0008-6223 |
| 关键词 | Carbon aerogels Fiber reinforced carbon aerogel-like matrix composites Pore structure Mechanical property Thermal insulation |
| DOI | 10.1016/j.carbon.2022.05.059 |
| 通讯作者 | Tang, Sufang(sftang@imr.ac.cn) |
| 英文摘要 | The microstructure evolution of carbon fiber reinforced carbon aerogel-like matrix (C/CA) composites with carbonization temperature and its influence on their properties were investigated. The removal of residual organo-functional groups of the C/CA precursors is dominant when carbonized at 600-750 degrees C with a large volume shrinkage difference by 17-22% as compared to that at 1200 degrees C, while the rearrangement of novolac structures is dominant at 900-1200 degrees C with a slight volume shrinkage fluctuation of 6%. Resultantly, the amount of micropore first increases and then decreases, while the particle size experiences an opposite change. The microstructure correspondingly transforms from a completely amorphous state to a partially amorphous state with graphite crystallites in low-angle misorientation, and then with graphite-like entangling ribbons. Due to the reduced residual tensile stress and increased interfacial bonding, the resulting composites with a variable bulk density of 0.58-0.64 g cm-3 have much higher compressive strengths of 45.8-96.9 MPa than other reported carbon foams or aerogels with similar bulk densities. The increase of strength and modulus with carbonization temperature is mainly due to the smaller tensile stress, higher particle packing compactness, larger microcrystallite size and less residual organo-functional groups. The composites also present a relatively low thermal conductivity of 0.12-0.59 W m-1 K-1. The increase of thermal conductivity with temperature is related to the synergistic effect of reduced phonon scattering associated with smaller specific surface area, larger microcrystallite size and less organo-functional groups and improved phonon transfer associated with increased interparticle contact area. |
| 资助项目 | National Natural Science Foundation of China of China[52022101] ; National Natural Science Foundation of China of China[U20A20242] ; National Natural Science Foundation of China of China[52188101] ; National Natural Science Foundation of China of China[51902315] ; Research Fund of Youth Innovation Promotion As-sociation of CAS, China[2021190] |
| WOS研究方向 | Chemistry ; Materials Science |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000809719900002 |
| 资助机构 | National Natural Science Foundation of China of China ; Research Fund of Youth Innovation Promotion As-sociation of CAS, China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/174434]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Tang, Sufang |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Jian,Li, Jian,Guo, Penglei,et al. Tailoring microstructures of carbon fiber reinforced carbon aerogel-like matrix composites by carbonization to modulate their mechanical properties and thermal conductivities[J]. CARBON,2022,196:807-818. |
| APA | Ma, Jian.,Li, Jian.,Guo, Penglei.,Pang, Shengyang.,Hu, Chenglong.,...&Cheng, Hui-Ming.(2022).Tailoring microstructures of carbon fiber reinforced carbon aerogel-like matrix composites by carbonization to modulate their mechanical properties and thermal conductivities.CARBON,196,807-818. |
| MLA | Ma, Jian,et al."Tailoring microstructures of carbon fiber reinforced carbon aerogel-like matrix composites by carbonization to modulate their mechanical properties and thermal conductivities".CARBON 196(2022):807-818. |
入库方式： OAI收割
来源：金属研究所
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