难熔金属组元对碳纤维增强复合材料棒结构与性能的影响分析

摘要

With the help of ultrasonic wave and high-speed mechanical shearing, the dispersion of nanoand micron-size metal components in the matrix resin was improved. The effects of the content, particle size and dispersion state of metal components on the structure and properties of carbon fiber reinforced composites were studied by tensile tests, SEM and other methods. The results indicated that the introduction and the increased content of refractory metal components would cause the reduction of mechanical properties of composite rods. The introduction of nano metal component exhibited less harm to the mechanical properties of the rods compared with the micron-size metal component. Both ultrasonic wave and high-speed mechanical shearing were able to make the nano-and micron-size metal components dispersed in the matrix resin to the maximum extent, and SEM showed that ultrasonic wave was superior over high-speed mechanical shearing in improving the dispersion of the nanoor micron-size metal components in the matrix resin.%利用拉伸测试、弯曲测试、扫描电子显微镜等方法研究了金属组元的含量、粒径的大小、组元的分散状况对碳纤维增强复合材料结构与性能的影响。研究结果表明,难熔金属组元的引入和组元含量的增加都会造成复合材料棒力学性能的降低。其中,纳米级金属组元的引入对复合材料力学性能的损伤低于微米级金属组元对复合材料力学性能的损伤。同时超声波分散和高速机械式剪切分散都能最大限度的使纳米或者微米级金属组元分散在基体树脂中。SEM分析表明对于提高纳米或者微米级金属组元在树脂体系中分散均匀性,超声波的分散方式优于高速机械式剪切的分散方式。