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基于差压铸造原理开发出连续碳纤维增强铝基复合材料(Cf/Al)真空辅助差压浸渗制备新工艺。采用扫描电镜(SEM)、X射线衍射仪(XRD)和透射电镜(TEM)分析了Cf/Al复合材料的微观组织、纤维分布、界面结构成分和试样断口形貌,通过三点弯曲试验测试了Cf/Al复合材料的室温抗弯强度。结果表明,制备的复合材料组织致密,纤维分布均匀且与基体结合良好;复合材料中界面反应物尺寸细小且呈非连续分布状态,其主要成分为Al4C3相和Mg2Si相;复合材料室温抗弯强度达到了1 078MPa,断口有部分纤维拔出和C/Al界面脱粘现象,呈现出明显的韧性断裂特征。
Based on the principle of differential pressure die casting, a new process of vacuum assisted differential infiltration for carbon fiber reinforced aluminum matrix composites (Cf / Al) was developed. The microstructure, fiber distribution, interfacial structure and fracture morphology of Cf / Al composites were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and transmission electron microscopy (TEM) The room temperature bending strength of Cf / Al composites. The results show that the prepared composite has compact structure, uniform fiber distribution and good bonding with the matrix. The interfacial reactants in the composite are small and discontinuous, and the main components are Al4C3 phase and Mg2Si phase. The room temperature bending strength Reached 1078MPa, the fracture has some fiber pull-out and C / Al interface debonding phenomenon, showing a clear ductile fracture characteristics.