Investigating the Influence of Material Composition on the Wear Resistance of Conventional and Metal Matrix Composite Brake Pads

This study explores the development and evaluation of aluminum alloy composites reinforced with titanium dioxide (TiO2) nanoparticles, aiming to enhance their mechanical and wear properties for advanced engineering applications. Aluminum-based composites are widely recognized for their high strength-to-weight ratio, excellent corrosion resistance, and thermal conductivity. By incorporating TiO2 nanoparticles, this research seeks to further improve these properties. The composites were synthesizedusing the powder metallurgy technique, which involves mixing aluminum alloy powders with TiO2 nanoparticles, compacting them, and subsequently sintering the mixture to form a dense, homogeneous material. Comprehensive mechanical testing was performed, including assessments of tensile strength, hardness, and impact resistance, to determine the impact of TiO2 reinforcement on the overall performance of the composites. The results demonstrated a marked improvement in tensile strength and hardness, suggesting a strong interfacial bonding between the aluminum matrix and TiO2 particles. Impact resistance was alsoenhanced, indicating improved energy absorption capabilities of the composites. Additionally, wear tests were conducted under various loading conditions and sliding velocities to examine the tribological behavior of the composites. The findings revealed a significant increase in wear resistance with the inclusion of TiO2 nanoparticles, attributed to the hard ceramic nature of TiO2, which provides a protective barrier against abrasion and surface degradation. The wear mechanisms were further analyzed usingscanning electron microscopy (SEM), highlighting the role of TiO2 in reducing wear rate and preventing surface damage.