Abstract
Silicon carbide particle (SiCp) reinforced aluminum matrix composites have potential applications for components under severe service conditions. However, their performance is commonly limited by challenges such as insufficient interfacial bonding strength, agglomeration and brittle interfacial reaction products. In this paper, the ultra-fine grained aluminum and in-situ formed amorphous alumina were fabricated, and the as-formed powder metallurgy SiCp/Al composites achieved excellent properties, with a high yield strength of 471 MPa and an ultimate tensile strength of 505 MPa, respectively. We systematically investigated the structures of the amorphous alumina, which bonds the SiCp and matrix together, improving the interfacial bonding strength and simultaneously suppressing the interfacial reactions. Notably, the proposed fabrication method is suitable for economic production of large-scale components and applicable for aluminum matrix composites with other types of reinforcements.
Published Version
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