| 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)
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| 2014
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| 发表期刊 | NEW CARBON MATERIALS
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| 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
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| 学科领域 | Materials Science
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| DOI | 10.1016/S1872-5805(14)60124-4
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| 收录类别 | SCI
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| WOS记录号 | WOS:000332350400005
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.ihep.ac.cn/handle/311005/225207
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| 专题 | 多学科研究中心
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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.
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| 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.
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| 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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