Tribological and Profilometer Analysis of Hybrid Metal Matrix Composite Under Varying Normal Load and Sliding Velocity
摘要
This work investigates the tribological properties of a hybrid Al7075 metal matrix composite (MMC) reinforced with CDA (cow dung ash) and SiC (silicon carbide) particles. The combination of traditional reinforcement with a non-traditional and environmentally friendly substance such as CDA presents a novel approach to improving the matrix material's tribological performance. To fabricate the hybrid composites, a two-stage stir-casting procedure is utilized, which ensures that SiC and CDA are distributed evenly throughout the aluminum matrix. An optical microscopy study was conducted on the composite material to analyze its microstructure. The Vickers micro-hardness test was used to determine the composite’s indentation resistance. Tribological analysis of the developed composite was assessed by wear testing on a pin-on-disc setup. Under varying normal loads and sliding velocities, composite samples were measured for wear rate. FESEM, along with EDS and profilometer analysis, was used to examine the morphology and surface roughness of worn-out surfaces. The findings of this study not only contribute to a better understanding of hybrid metal matrix composites but also provide a sustainable and environmentally friendly solution by incorporating CDA as a reinforcement.