Experimental study on the Tribological Behavior of Advanced Composite Materials Under Dry and Lubricated Conditions

The performance of engineering components operating under varying contact conditions is strongly influenced by the tribological characteristics of the materials employed, particularly in applications where friction, wear, and surface degradation determine service life and efficiency. This study presents a detailed experimental investigation of the tribological behavior of advanced composite materials under both dry and lubricated sliding conditions. The composites examined were developed using high-strength reinforcements embedded within polymer and hybrid matrices, designed to enhance load-bearing capacity and resistance to surface damage. Experimental tests were conducted using a controlled tribometer setup, in which parameters such as normal load, sliding speed, and duration were systematically varied to evaluate their effects on the frictional response and wear mechanisms. Under dry conditions, the results indicate a relatively higher coefficient of friction and accelerated wear rates, primarily attributed to direct asperity contact, microploughing, and the formation of unstable transfer films. In contrast, the introduction of lubrication significantly altered the interfacial behavior by reducing direct surface interaction, promoting the formation of a protective lubricating film, and thereby minimizing material loss. The study also reveals that the presence of specific reinforcements, such as ceramic particulates or fibers, contributes to improved wear resistance by enhancing hardness and thermal stability, although their effectiveness is dependent on uniform dispersion and interfacial bonding within the matrix. Surface morphology analysis using microscopic techniques further supports these findings, showing distinct wear patterns such as abrasive grooves, delamination, and oxidative layers under different test conditions. Additionally, the synergistic effect of lubrication and composite microstructure was observed to play a critical role in stabilizing friction and extending material lifespan. The experimental outcomes highlight that while advanced composites exhibit promising tribological performance, their behavior is highly sensitive to operating conditions and material composition. This research provides valuable insights into optimizing composite design and lubrication strategies for improved durability and efficiency in mechanical systems, particularly in automotive, aerospace, and industrial applications where reliable tribological performance is essential.