中间相沥青基碳纤维石墨化度对<strong>Cf/Al</strong>界面损伤的影响

doi:10.11901/1005.3093.2021.181

材料研究学报

2022, Vol. 36

Issue (8): 579-590 DOI: 10.11901/1005.3093.2021.181

研究论文

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中间相沥青基碳纤维石墨化度对Cf/Al界面损伤的影响

张鹏¹, 黄东¹^,², 张福全¹(

), 叶崇¹^,², 伍孝¹^,², 吴晃¹

^1.湖南大学材料科学与工程学院先进炭材料及应用技术湖南省重点实验室长沙 410082
^2.湖南东映碳材料科技有限公司沥青基高性能碳材料湖南省工程研究中心长沙 410006

Effect of Graphitization Degree of Mesophase Pitch-based Carbon Fibers on Carbon Fiber/Al Interface Damage

ZHANG Peng¹, HUANG Dong¹^,², ZHANG Fuquan¹(

), YE Chong¹^,², WU Xiao¹^,², WU Huang¹

^1.College of Materials Science and Engineering, Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, Hunan University, Changsha 410082, China
^2.Hunan Province Engineering Research Center for High Performance Pitch-based Carbon Materials, Hunan Toyi Carbon Material Technology Co. Ltd., Changsha 410006, China

引用本文:

张鹏, 黄东, 张福全, 叶崇, 伍孝, 吴晃. 中间相沥青基碳纤维石墨化度对Cf/Al界面损伤的影响[J]. 材料研究学报, 2022, 36(8): 579-590.
Peng ZHANG, Dong HUANG, Fuquan ZHANG, Chong YE, Xiao WU, Huang WU. Effect of Graphitization Degree of Mesophase Pitch-based Carbon Fibers on Carbon Fiber/Al Interface Damage[J]. Chinese Journal of Materials Research, 2022, 36(8): 579-590.

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摘要:

以不同石墨化度的中间相沥青基碳纤维为基底磁控溅射构筑Cf/Al界面,研究了不同石墨化度Cf/Al界面微观结构的演变,并与聚丙烯腈碳纤维比较揭示了Cf/Al界面的损伤机制。结果表明：随着石墨化处理温度的提高中间相沥青基碳纤维的石墨微晶尺寸增大、取向度和石墨化度提高,Cf/Al界面的反应程度降低和碳纤维损伤减少。不同石墨化度Cf/Al界面的损伤决定于初始缺陷的数量和后续裂纹在碳纤维内部的增殖和扩展。在2400℃和2700℃石墨化处理使裂纹更容易在中间相沥青基碳纤维石墨微晶片层间扩展,去除镀层后纤维损伤比聚丙烯腈碳纤维分别高5.19%和3.70%；在3000℃石墨化处理后,化学惰性较大的中间相沥青碳纤维使界面反应产生的缺陷数量大幅度减小,去除镀层后纤维的损伤比聚丙烯腈碳纤维低1.85%。

关键词 ：复合材料, 界面损伤, 磁控溅射, Cf/Al界面, 中间相沥青基碳纤维

Abstract：

Composite of carbon fiber (Cf) with Al-film (Cf/Al) was constructed by magnetron sputtering with mesophase pitch-based carbon fibers of different graphitization degrees as matrix and Al-plate as sputtering target. Then, the microstructure evolution of Cf /Al interface of the prepared composites was investigated, and the damage mechanism of Cf /Al interface was revealed in comparison to that prepared with polyacrylonitrile carbon fiber. The results show: With the increase of graphitization temperature, the size, the degree of orientation and graphitization of graphite micro-crystallites in mesophase asphalt based carbon fiber increased, whilst both of the reaction degree of Cf /Al interface and the damage of carbon fiber reduced. The damage of Cf /Al interface of the composites prepared with Cf of different graphitization degrees depends on the number of initial defects and the propagation of subsequent cracks in the carbon fiber. The graphitization treatment at 2400℃ and 2700℃ could facilitate the crack propagation through graphite micro-lamellas located in between mesophase asphalt-based carbon fibers, however after removing the Al-coating, the fiber damage was 5.19% and 3.70% higher than that of polyacrylonitrile carbon fiber respectively. After graphitization at 3000℃, the mesophase bituminous carbon fiber with higher chemical inertia could reduce the number of defects generated by interfacial reaction, whilst, after removing the Al-coating, the damage of the fiber was 1.85% lower than that of polyacrylonitrile carbon fiber.

Key words： composite interface damage magnetron sputtering Cf/Al interface mesophase pitch-based carbon fiber

收稿日期: 2021-03-15

ZTFLH:

TB333

基金资助:国家自然科学基金(52002104);湖南省科技创新建设专项基金(2020RC3075);湖南省科技创新建设专项基金(2019RS2058);湖南省科技创新建设专项基金(2019GK2021);湖南省科技创新建设专项基金(2020GK4029);博士后科学基金(2020M672480)

作者简介: 张鹏,男,1996年生,硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2021.181 或 https://www.cjmr.org/CN/Y2022/V36/I8/579

表1 碳纤维的性能参数

图1 磁控溅射原理的示意图

图2 碳纤维CfMP-24表面、CfMP-24截面、CfMP-27-表面、CfMP-27截面、CfMP-30表面、CfMP-30截面、CfPAN表面以及CfPAN截面的SEM照片

图3 碳纤维表面和截面的拉曼光谱

图4 碳纤维赤道扫描、子午扫描、方位角扫描以及粉末扫描的XRD谱

表2 碳纤维石墨微晶结构参数和石墨化度

图5 碳纤维CfMP-24、CfMP-27、CfMP-30以及CfPAN的HRTEM形貌

图6 镀Al碳纤维的微观形貌

图7 镀Al碳纤维热处理后的形貌

图8 碳纤维表面损伤的形貌

表3 碳纤维单丝强度的损失率

图9 石墨化度对界面反应活性的影响机制和拉伸断裂过程中碳纤维微观结构对裂纹扩展的影响机制

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