Microvoid evolution in carbon fibers during graphitization for the preparation of carbon/carbon composites

doi:10.1016/S1872-5805(14)60124-4

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	Microvoid evolution in carbon fibers during graphitization for the preparation of carbon/carbon composites
	Wu, GP; Li, DH; Yang, Y; Lu, CX; Zhang, SC; Xu, Y; Li, XT; Feng, ZH; Li, ZH; Wu, ZH;李志宏; Wu ZH(吴忠华)
	2014
发表期刊	NEW CARBON MATERIALS (IF:1.02[JCR-2016],1.095[5-Year])
ISSN	1007-8827
EISSN	1872-5805
卷号	29 期号:1 页码:41-46
摘要	Polyacrylonitrile-based carbon fiber bundles, with two sides fixed, were heated in a graphitization furnace with temperature profiles similar to those used in the preparation of carbon/carbon composites. The microstructure of the microvoids formed was characterized by small-angle X-ray scattering and high resolution transmission electron microscopy (HR-TEM). Results showed that the average radius of gyration of the microvoids decreases, and their length, width, cross-sectional area and volume fraction decrease followed by a slight increase with increasing temperature, with the minima found at around 2300 C. The HR-TEM images showed that the microvoids were formed by stacking defects of the carbon layers. The ordering of the amorphous carbon layers accounted for the initial decrease of size and volume fraction of the voids with increasing temperature, while the growth and ordering of the layers at high temperatures gave rise to increases in their size and volume fraction.
关键词	Carbon fibers Small-angle X-ray scattering Carbon layer structures Graphitization
学科领域	Materials Science
DOI	10.1016/S1872-5805(14)60124-4
收录类别	SCI
语种	英语
WOS记录号	WOS:000332350400005
引用统计	正在获取...
文献类型	期刊论文
条目标识符	https://ir.ihep.ac.cn/handle/311005/225207
专题	多学科研究中心
推荐引用方式 GB/T 7714	Wu, GP,Li, DH,Yang, Y,et al. Microvoid evolution in carbon fibers during graphitization for the preparation of carbon/carbon composites[J]. NEW CARBON MATERIALS,2014,29(1):41-46.
APA	Wu, GP.,Li, DH.,Yang, Y.,Lu, CX.,Zhang, SC.,...&吴忠华.(2014).Microvoid evolution in carbon fibers during graphitization for the preparation of carbon/carbon composites.NEW CARBON MATERIALS,29(1),41-46.
MLA	Wu, GP,et al."Microvoid evolution in carbon fibers during graphitization for the preparation of carbon/carbon composites".NEW CARBON MATERIALS 29.1(2014):41-46.