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Tailoring microstructures of carbon fiber reinforced carbon aerogel-like matrix composites by carbonization to modulate their mechanical properties and thermal conductivities
Ma, Jian1,2; Li, Jian1; Guo, Penglei1,2; Pang, Shengyang1; Hu, Chenglong1; Zhao, Rida1,2; Tang, Sufang1,4; Cheng, Hui-Ming3
Corresponding AuthorTang, Sufang(sftang@imr.ac.cn)
2022-08-30
Source PublicationCARBON
ISSN0008-6223
Volume196Pages:807-818
AbstractThe 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.
KeywordCarbon aerogels Fiber reinforced carbon aerogel-like matrix composites Pore structure Mechanical property Thermal insulation
Funding OrganizationNational Natural Science Foundation of China of China ; Research Fund of Youth Innovation Promotion As-sociation of CAS, China
DOI10.1016/j.carbon.2022.05.059
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaChemistry ; Materials Science
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary
WOS IDWOS:000809719900002
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/174435
Collection中国科学院金属研究所
Corresponding AuthorTang, Sufang
Affiliation1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
4.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
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.
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