Surface Modified Reinforcements on the Structure Properties of A356/SiC Stir Cast Composite

Abstract

The primary purpose of this study is to gain a deeper understanding of the structure and mechanics of an ex-situ A356/Cu-coated with different weight percentages (x: 1, 3) of SiC stir-cast metal matrix composite. This study aims to improve silicon carbide's wetting and adhesion characteristics by fabricating a Cu-coated composite utilizing an electrolytic deposition technique based on aluminum. This green manufacturing method significantly reduces environmental impact compared to traditional coating processes, a crucial aspect in today's world. Examination of the optical microstructure of the SiC composite revealed a clustering of reinforcements within the matrix, potentially resulting from additional barriers formed during the stirring process that impede the movement of SiC particles. Furthermore, incorporating copper-coated SiC reinforcement led to a more even distribution of reinforcements in the matrix. The ultimate tensile strength, yield strength, and hardness of the 3 wt% copper-coated metal matrix composite cast are 225.97 MPa, 130.27 MPa, and 76.5 BHN, respectively, demonstrating superior mechanical properties compared to the other cast composites. The study opens potential paths for further advancements in composite technology.