Preparation of particles reinforced Aluminum matrix composites by In-Situ synthesized Al-Ti intermetallics

摘要

Using particle reinforced aluminum matrix composites have many advantages,for example: high specific strength, good thermal conductivity, low thermal expansion coefficient, good fatigue and wear resistance and stable high temperature performance. However, there are two aspects that need further research and improvement: reasonable choice of performance difference between reinforced phase particles and matrix, reasonable design of interface structure between reinforced phase particles and matrix. Using in-situ autologous method to prepare composites. In this way, we solved the problem that the morphology of the enhanced phase was laminated with low strength, and prepared core shell structure reinforced phase. In this paper, we will demonstrate relevant studies about Ti-Al core-shell structure particles reinforced aluminum matrix composites. Studies show optimal Ti-Al ratio of the core-shell structure reinforced phase should be 1:3. Meanwhile, we will analyze mechanical properties of composites. We prepared the reinforced phase into aluminum substrate. As the result, the mechanical properties of composites were determined to be excellent when the proportion of the reinforced phase was between 5% and 10%.