论文部分内容阅读
碳纤维增强铝基复合材料(Cf/Al)具有众多优良性能,因而受到广泛重视和应用。采用一体化成形且能够保证高真空度和高浸渗压力的真空吸渗挤压工艺制备二维碳纤维增强铝基复合材料(2D-Cf/Al)。通过微观组织观察,研究不同挤压力(比压)下复合材料的浸渗质量,得到最佳的比压值。结果表明:采用该工艺能够制备出浸渗质量良好的Cf/Al复合材料,最佳比压为75MPa。此时,铝合金充填均匀,纤维损伤和铸造缺陷较少,浸渗情况良好,复合材料的力学性能最佳,其最大拉伸强度与基体合金相比提高138.9%。
Carbon fiber reinforced aluminum matrix composites (Cf / Al) has many excellent properties, which have received widespread attention and application. Two-dimensional carbon fiber reinforced aluminum matrix composites (2D-Cf / Al) were prepared by a vacuum infiltration extrusion process that was integrally formed and capable of ensuring high vacuum and high infiltration pressure. Through microstructure observation, the infiltration quality of composites under different extrusion pressure (specific pressure) was studied, and the best specific pressure value was obtained. The results show that Cf / Al composites with good infiltration quality can be prepared by this process. The optimum specific pressure is 75MPa. At this time, the aluminum alloy was uniformly filled, the fiber damage and casting defects were less, the impregnation was good, the mechanical properties of the composites were the best, and the maximum tensile strength was increased by 138.9% compared with the matrix alloy.