D3: 3-D textile reinforced Al-matrix composites by high pressure die casting

复杂的3-D碳纤维预制体是在高压压铸过程中与铝渗透。如果我们的方法成功了，它将代表着与气体压力渗透相比的重大突破，这是制造纤维增强金属部件的最先进技术。与上述技术相比，压力压铸有几个优点。该工艺周期短的特点不仅具有巨大的经济优势，而且还减少了纤维预成型和铝基体之间的动力学控制的有害反应。在前期压铸试验和渗渗过程数值模拟的基础上，进一步改进了纤维预制坯的预热，实现了超前的模具设计。结合项目合作伙伴开发的先进合金成分和纤维涂层，该项目的主要目标是实现具有更高横向强度和延展性的金属基复合材料（MMC）。详细了解界面反应是将工艺参数、合金和涂层成分与所获得的MMC的力学性能联系起来的必要条件。为了使结果合理化，设想了先进的微观结构研究，如SEM-FIB，高分辨率TEM和Flow-3D和ABAQUS对渗透过程的数值计算。

Complex 3-D carbon fibre preforms are to be infiltrated with aluminium in a high pressure die casting process. If our approach is successful, it will represent a major breakthrough compared to gas pressure infiltration, the state-of-the-art technology to manufacture fibre reinforced metal parts. Compared to the above mentioned technology, pressure die casting offers several advantages. The short cycle times characteristic for this process are not only of a substantial economic advantage, but also constrict the kinetically controlled deleterious reactions between the fibre-preforms and the aluminium matrix. Based on results of preliminary die casting experiments and numerical simulations of the infiltration process, an advanced mould design was realized in the past project phase further improving fibre preform preheating. In combination with advanced alloy compositions and fibre coatings developed by the project partners the main aims of the proposed continuation are to realize metal matrix composites (MMC) with improved transversal strength and ductility. A detailed understanding of the interface reactions is necessary to relate processing parameters, alloy and coating composition to the mechanical properties of the obtained MMC. In order to rationalise results, advanced microstructural investigations like SEM-FIB, high resolution TEM and numerical calculations of the infiltration process with Flow-3D and ABAQUS are envisaged.