Mechanical and Physical Properties Observations for Cu-Gr-SiC Composite Synthesized by Powder Metallurgy

This study examines the mechanical and physical properties of copper-graphite-silicon carbide (Cu-Gr-SiC) metal matrix composites (MMCs), focusing on parameters such as density, micro-hardness, compressive strength, flexural strength, and EDX analysis. Composites were developed using ۵ wt.% graphite and varying SiC content (۰–۱۵ wt.%), using powder metallurgy techniques. The sintered density decreased from ۸.۲۳ g/cc for pure copper to ۶.۰۹ g/cc for the composite with ۱۵ wt.%SiC, attributed to the lower densities of the reinforcing phases. Micro-hardness increased from ۵۶ HV to ۷۴.۲ HV with rising SiC content, reflecting the hardening and grain refinement effect of SiC. Flexural strength reached a maximum of ۲۰۰ MPa at ۱۵ wt.%SiC, while compressive strength improved up to ۵ wt.% SiC but declined at higher concentrations due to increased brittleness. EDX analysis confirmed uniform dispersion of reinforcements with minimal oxidation. These results support the use of Cu-Gr-SiC MMCs in demanding applications, with an optimal balance between reinforcement and mechanical performance.

کلیدواژه ها:

Metal matrix composite ، Micro-hardness ، Compressive Strength ، Flexural strength ، Energy Dispersive X-ray (EDX)