| 论文简介 |
Due to characteristics of high strength, light weight, excellent corrosion resistance and high temperature resistance, continuous carbon fiber reinforced poly-ether-ether-ketone (CCF/PEEK) composites have received great attention. In this paper, CCF/PEEK composites was first prepared by the process of extrusion 3D printing. Interlayer delamination was reported as one of the major factors limiting the performance of thermoplastics extrusion 3D printing, which is exacerbated due to the introduction of continuous fibers in this process. In order to overcome the interlayer delamination of CCF/PEEK composites, the impregnation behaviors between carbon fiber tow and PEEK were firstly studied by adjusting the viscosity of the matrix materials and implementing the process of pre-impregnation, while the interlayer bonding behaviors in different laser preheating temperatures were studied then. After the analysis and optimization, the sufficient impregnation was realized and the interlayer bonding of CCF/PEEK composites was effectively improved. The interlaminar shear strength and flexural strength of CCF/PEEK composites can reach over 35MPa and 480MPa respectively, which provides a promising candidate for the preparation of complex structural parts in aviation, aerospace and medical applications as a replacement of metal. |
(创新港)
