Influence of graphene dispersion in aluminum-graphene-composites on mechanical and electrical properties of extruded profiles

铝-石墨烯复合材料中石墨烯分散对挤压型材力学和电性能的影响

• 批准号: 426183735
• 负责人: Professor Dr. Aleksander Gurlo
• 金额: --
• 依托单位: Fachgebiet Keramische Werkstoffe
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/426183735?language=en
• 关键词: Influence; graphene; dispersion; aluminum; composites

Aluminum alloys are widely applied for lightweight constructions due to their high weight- specific strength and easy processability. Graphene exhibits outstanding values of strength, stiffness and electric conductivity. Thus, it is an attractive candidate to be applied as strengthening phase in aluminum. In order to achieve an effective strengthening effect graphene needs to be dispersed homogenously in the Al-matrix. The overall aim of the project is to study the influence of different manufacturing processes on the graphene dispersion. In order to achieve a satisfying bonding between matrix and graphene a proper functionalization will be applied. Additionally, Al-powder and graphene will be mixed on the one hand mechanically and on the other hand in a wet chemical process. After pre-compacting the influence of the extrusion process as well as the shear deformation via the ECAP-process on the dispersion of graphene will be investigated. Afterwards the microstructures will be analyzed and the mechanical properties of the compounds will be characterized in tensile tests. Finally, the electric conductivity of these innovative compound materials will be examined in order to get to know whether they can be applied as lighter and cheaper conducting material in comparison to conventional copper.

铝合金由于其高重量比强度和易于加工性而被广泛应用于轻质结构。石墨烯具有出色的强度、刚度和导电性。因此，它是用作铝强化相的有吸引力的候选者。为了达到有效的强化效果，石墨烯需要均匀地分散在铝基体中。该项目的总体目标是研究不同制造工艺对石墨烯分散的影响。为了在基质和石墨烯之间实现令人满意的结合，将应用适当的功能化。此外，铝粉和石墨烯一方面通过机械方式混合，另一方面通过湿化学工艺混合。预压实后，将研究挤压过程以及 ECAP 过程的剪切变形对石墨烯分散的影响。随后将分析微观结构，并在拉伸测试中表征化合物的机械性能。最后，我们将检查这些创新复合材料的电导率，以了解它们是否可以用作比传统铜更轻、更便宜的导电材料。