Stir casting process for manufacture of Al–SiC composites

摘要: Stir casting is an economical process for the fabrication of aluminum matrix composites. There are many parameters in this process, which affect final microstructure and mechanical properties In study, micron-sized SiC particles were used as reinforcement to fabricate Al-3 wt% composites at two temperatures (680 850 °C) stirring periods (2 6 min). Factors reaction matrix/ceramic interface, porosity, ceramic incorporation, agglomeration evaluated by scanning electron microscope (SEM) high-resolution transition (HRTEM) studies. From microstructural characterizations, it concluded that shorter period required incorporation achieve metal/ceramic bonding interface. The higher temperature (850 °C) also leads improved incorporation. some cases, shrinkage porosity intensive formation Al4C3 interface observed. Finally, evaluated, their relation with corresponding processing was discussed.