Investigation on the Tribological Properties of an Organic Matrix Composite Material Designed for Brake Applications

Metal and organic matrix composites are extensively used in the automotive industry and handling equipment like cranes, forklifts, overhead cranes, and elevators. One of the primary applications for these materials is in brake linings, where the ability to halt movement through braking is crucial for both safety and environmental protection. This experimental study involves tests conducted on a tribometer, using two different materials for the brake linings against a cast iron drum, the first sample (sample I) is a commercially available brake lining, and the second (sample II) is a locally prepared one. A comparative analysis was performed for both samples under identical experimental conditions, using the same normal load (5 and 10 N) and sliding speed (35 and 50 mm/s). Measurements taken during each test include mass loss, tangential force, and friction coefficient. Additionally, the wear tracks were examined microscopically to understand the observed phenomena and to identify a material with optimal performance. The obtained results from energy-dispersive X-ray analysis (EDAX) conducted via scanning electron microscopy (SEM) and shore hardness measurements are compared with values available in the technical literature and standard requirements. The measured friction coefficient (µ = 0.354 to 0.47) falls within the range specified by quality control standards for effective braking. Sample II demonstrated a wear rate of 4.57 × 10-8 cm3/N.m, significantly outperforming Sample I, which had a wear rate of 11.53 × 10-8 cm³/N.m. This highlights Sample II's superior wear resistance and its potential for brake lining applications.