Tailoring microstructures of carbon fiber reinforced carbon aerogel-like matrix composites by carbonization to modulate their mechanical properties and thermal conductivities

doi:10.1016/j.carbon.2022.05.059

IMR OpenIR

	Tailoring microstructures of carbon fiber reinforced carbon aerogel-like matrix composites by carbonization to modulate their mechanical properties and thermal conductivities
	Ma, Jian 1,2; Li, Jian 1; Guo, Penglei 1,2; Pang, Shengyang 1; Hu, Chenglong 1; Zhao, Rida 1,2; Tang, Sufang 1,4; Cheng, Hui-Ming 3
通讯作者	Tang, Sufang(sftang@imr.ac.cn)
	2022-08-30
发表期刊	CARBON
ISSN	0008-6223
卷号	196 页码:807-818
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.
关键词	Carbon aerogels Fiber reinforced carbon aerogel-like matrix composites Pore structure Mechanical property Thermal insulation
资助者	National Natural Science Foundation of China of China ; Research Fund of Youth Innovation Promotion As-sociation of CAS, China
DOI	10.1016/j.carbon.2022.05.059
收录类别	SCI
语种	英语
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
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary
WOS记录号	WOS:000809719900002
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：26[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/174435
专题	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, 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
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.