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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
Source PublicationNEW CARBON MATERIALS
ISSN1007-8827
EISSN1872-5805
Volume29Issue:1Pages:41-46
AbstractPolyacrylonitrile-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.
KeywordCarbon fibers Small-angle X-ray scattering Carbon layer structures Graphitization
Subject AreaMaterials Science
DOI10.1016/S1872-5805(14)60124-4
Indexed BySCI
Language英语
WOS IDWOS:000332350400005
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/225207
Collection多学科研究中心
Recommended Citation
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.
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