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High strength metallurgical graphene as an additional reinforcing phase for carbon fibre composites
Archives of Civil and Mechanical Engineering ( IF 4.4 ) Pub Date : 2020-02-24 , DOI: 10.1007/s43452-020-00024-2
A. Kunikowska , W. Szymanski , A. Jedrzejczak , S. Lipa , M. Galazka , M. Szlachetka , P. Kula

The main objective of the present study is an elaboration of a method for a transfer of high strength metallurgical graphene (HSMG) and its introduction into the structure of fibre laminates. In this work, two transfer procedures have been established: a transfer onto structural adhesive film (SAF) and a direct transfer onto two types of carbon fibre pre-impregnates (uniaxial and biaxial cloth). An important novelty of the presented experimental work is a use of scanning electron microscopy (SEM) operating in the absorbed electrons (AE) mode. This technique enables the evaluation of graphene continuity on a large area within a relatively short time. The SEM/AE technique made it possible to ascertain that the transferred graphene was characterised by a low level of defects, indicating that it could be used as a reinforcing phase in composites. Both transfer procedures, one onto SAF and the other directly onto the pre-impregnates were used for manufacturing flat laminates as well as tubular profiles. The flat samples, containing 0.68 ppm HSMG by weight, exhibited a 9% increase of low cycle fatigue strength. The tubular profiles (bicycle components) with approximately 0.22 ppm of HSMG exhibited a significant increase of fatigue wear during initial tests. In addition, no fatigue delamination was observed at interfaces between the pre-impregnates separated with HSMG graphene.

中文翻译:

高强度冶金石墨烯作为碳纤维复合材料的附加增强相

本研究的主要目的是阐述一种转移高强度冶金石墨烯(HSMG)的方法并将其引入纤维层压板的结构。在这项工作中,已经建立了两种转移程序:转移到结构粘合膜(SAF)上和直接转移到两种类型的碳纤维预浸渍物(单轴和双轴布)上。提出的实验工作的一个重要的新颖性是使用在吸收电子(AE)模式下运行的扫描电子显微镜(SEM)。该技术使得能够在相对短的时间内在大面积上评估石墨烯的连续性。SEM / AE技术可以确定所转移的石墨烯具有低缺陷水平,这表明它可用作复合材料的增强相。两种转移程序(一种转移到SAF上,另一种直接转移到预浸渍液上)都用于制造扁平层压板和管状型材。含0.68 ppm(重量)HSMG的扁平样品,其低循环疲劳强度提高了9%。HSMG约为0.22 ppm的管状轮廓(自行车部件)在初始测试期间显示出疲劳磨损的显着增加。另外,在用HSMG石墨烯分隔的预浸渍物之间的界面上未观察到疲劳分层。HSMG约为0.22 ppm的管状轮廓(自行车部件)在初始测试期间显示出疲劳磨损的显着增加。另外,在用HSMG石墨烯分隔的预浸渍物之间的界面上未观察到疲劳分层。HSMG约为0.22 ppm的管状轮廓(自行车部件)在初始测试期间显示出疲劳磨损的显着增加。另外,在用HSMG石墨烯分隔的预浸渍物之间的界面上未观察到疲劳分层。
更新日期:2020-02-24
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