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| 定向碳纳米管/炭纳米复合材料形貌和显微结构 | |
| 引用本文： | 李志,巩前明,王野,吴建军,梁吉,黄启忠,熊翔,黄伯云.定向碳纳米管/炭纳米复合材料形貌和显微结构[J].新型炭材料,2010,25(5). |
| 作者姓名： | 李志 巩前明 王野 吴建军 梁吉 黄启忠 熊翔 黄伯云 |
| 作者单位： | 1. 清华大学,机械系,北京,100084;清华大学先进成形制造教育部重点实验室,北京,100084 2. 清华大学,机械系,北京,100084;清华大学先进成形制造教育部重点实验室,北京,100084;Department of Materials Science and Engineering,Cornell University,Ithaca,NY 14850,USA 3. 中南大学,粉末冶金国家重点实验室,湖南,长沙,410083 |
| 基金项目： | 先进成形教育部重点实验室基金(2008010); 航空预研基金(2006273)~~ |
| 摘 要： | 以CVD法定向碳纳米管(ACNTs)阵列为骨架,利用化学气相渗透(CVI)工艺制备了新型定向碳纳米管/炭(ACNT/C)纳米复合材料。通过偏光金相显微镜(PLM)、扫描电子显微镜(SEM)、高分辨透射电子显微镜(HRTEM)、X射线衍射(XRD)和Raman光谱等分析方法对其显微结构和热解炭沉积机理进行了研究。结果表明:所制ACNT/C纳米复合材料的热解炭结构主要为类粗糙层结构,围绕碳纳米管生长的热解炭石墨层片结构清晰,并且碳纳米管和热解炭之间具有良好的界面结合;而在相同工艺条件下围绕炭纤维生长的热解炭为典型的光滑层结构。这可能是由于在热解炭沉积过程中存在碳纳米管"诱导"沉积过程,即沿着碳纳米管径向的离域化共轭π键和具有类似结构的芳香族大分子通过π-π非共价键作用相结合,并在CNTs纳米尺寸的影响下,芳香族大分子按照"软取向"(Softepitaxy)围绕碳纳米管生成环形层片状类石墨结构的热解炭。该研究结果有望为热解炭的可控沉积起到一定的借鉴作用。 |
| 关 键 词： | 定向碳纳米管 炭/炭 热解炭 纳米复合材料 微观结构 |
Microstructure of the pyrocarbon in aligned carbon nanotube/carbon composites |
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| LI Zhi,GONG Qian-ming,WANG Ye,WU Jian-jun,LIANG Ji,HUANG Qi-zhong,XIONG Xiang,HUANG Bai-yun.Microstructure of the pyrocarbon in aligned carbon nanotube/carbon composites[J].New Carbon Materials,2010,25(5). | |
| Authors: | LI Zhi GONG Qian-ming WANG Ye WU Jian-jun LIANG Ji HUANG Qi-zhong XIONG Xiang HUANG Bai-yun |
| Affiliation: | LI Zhi1,2,GONG Qian-ming1,3,WANG Ye1,WU Jian-jun1,LIANG Ji1,HUANG Qi-zhong4,XIONG Xiang4,HUANG Bai-yun4(1. Department of Mechanical Engineering,Tsinghua University,Beijng100084,China,2. Key Laboratory for Advanced Materials Processing Technology,Ministry of Education,Beijing100084,3. Department of Materials Science and Engineering,Cornell University,Ithaca,NY 14850,USA,4. State Key Lab for Powder Metallurgy,Central South University,Changsha410083,China) |
| Abstract: | Aligned carbon nanotube reinforced carbon matrix(ACNT/C)composites were fabricated by densifying an ACNT preform with chemical vapor infiltration(CVI)and their microstructure was investigated by XRD,SEM,HRTEM,polarized light microscopy and Raman spectroscopy.Results show that the pyrocarbon in ACNT/C composites was of mainly rough lamella type,while that in traditional carbon/carbon composites obtained using the same process was of typically smooth lamella type with a larger interlayer spacing and a smaller... |
| Keywords: | Aligned carbon nanotubes(ACNTs) Carbon/carbon Pyrocarbon Microstructure Nanocomposites |
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