Study on optimizing the microstructures and properties of 50 wt% Si particle-reinforced Al matrix composites for electronic packaging based on the synergistic action of sub-rapid solidification and deformation strengthening

Abstract

In this work, we employed techniques based on the synergistic manufacturing strategy of sub-rapid solidification and deformation strengthening. Subsequently, we solved the issue of poor plastic deformation in Sip/Al composites and enhanced the microstructures and properties of such materials. The experimental results revealed that the solidified microstructure of the roll-cast composite was significantly more refined than the as-cast composite, with a 75.7 % reduction in the Si particle size. This remarkable microstructural optimization was the result of the multiple synergistic effects of the plastic deformation mechanism. Advanced characterization methods such as large-area electron backscatter diffraction stitching and transmission Kikuchi diffraction were used to reveal this potential microstructure-property response mechanism. In this study, we propose a novel strategy for overcoming challenges and optimizing performance in the plastic processing of Sip/Al composites, thereby laying a theoretical and experimental foundation for broadening the application of such materials.