| 石墨化处理对双层热解炭基2DC/C复合材料微观结构的影响 |
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| 引用本文： | 李伟,李贺军,张守阳,魏建锋,王杰,李照谦.石墨化处理对双层热解炭基2DC/C复合材料微观结构的影响[J].新型炭材料,2011,26(5). |
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| 作者姓名： | 李伟 李贺军 张守阳 魏建锋 王杰 李照谦 |
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| 作者单位： | 西北工业大学超高温复合材料重点实验室C/C复合材料中心,陕西西安,710072 |
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| 基金项目： | 国家自然科学基金重点项目，面上项目，"111"计划 |
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| 摘 要： | 综合采用偏光显微镜(PLM),X射线衍射仪(XRD),扫描电子显微镜(SEM),高分辨透射电子显微镜(HRTEM)等分析方法,逐层研究了2500℃高温石墨化(HTT)处理前后双层热解炭基2D C/C复合材料的不同织构以及纤维-基体界面的变化.结果表明:HTT处理后,d002值减小,石墨化度显著提高；内层低织构热解炭的断口微观形貌与晶格条纹几乎没有变化,而外层高织构热解炭晶格条纹更加平直,尤其是发现层间裂纹密度明显增大,使得处理后的高织构热解炭在受力时,裂纹易于在层间扩展和偏转,因此可有效提高材料的韧性；同时,纤维-基体界面发生弱化也是提高材料韧性的另一机制.HTT处理前后试样的三点弯曲力学性能试验结果证实了以上机制.
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| 关 键 词： | C/C复合材料 石墨化处理 微观结构 界面 |
Effect of high temperature treatment on the microstructure and mechanical properties of binary layer textured 2D C/C composites |
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| LI Wei,LI He-jun,ZHANG Shou-yang,WEI Jian-feng,WANG Jie,LI Zhao-qian.Effect of high temperature treatment on the microstructure and mechanical properties of binary layer textured 2D C/C composites[J].New Carbon Materials,2011,26(5). |
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| Authors: | LI Wei LI He-jun ZHANG Shou-yang WEI Jian-feng WANG Jie LI Zhao-qian |
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| Affiliation: | LI Wei,LI He-jun,ZHANG Shou-yang,WEI Jian-feng,WANG Jie,LI Zhao-qian (C/C Composites Research Center,Key Laboratory of Ultrahigh Temperature Composites,Northwestern Polytechnical University,Xi'an 710072,China) |
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| Abstract: | X-ray diffraction(XRD),scaning electron micrsocopy and transmission electron microscopy were used to study the changes of the pyrolytic carbon microstructure and fiber-matrix interface of binary layer textured 2D C/C composites before and after heat treatment.The XRD results show that the d002 decreased and the graphitization degree increased significantly with the increase of heat treatment temperature.No obvious change of the fracture surface morphology and lattice fringes of the inner layer,which corresp... |
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| Keywords: | Carbon/carbon composites High temperature heat treatment Microstructure Interface |
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