Tribological performance of Allium sativum- based brake pads using constant speed drag test at different conditions

Abstract

The airborne debris of the brake pad composite pollutes the air and makes the environment hazardous. Researchers develop organic and natural materials to replace such crucial materials without compromising the performance. Therefore, this research delves into the critical parameters of friction material: pressure, temperature fade, and breakaway torque conditions. The unique aspect of this study is the comprehensive analysis of Allium sativum's impact on the frictional performance of brake pads. The friction composites were scrutinized for their pressure and temperature fade at 5, 10, and 15 bar pressure at a constant speed of 660 ± 10 RPM and 100°C–200°C, 200°C–300°C, and 300°C–400°C temperature at a constant pressure of 11.7 bar in a Krauss test machine for 25 drag braking applications. Further breakaway torque tests (the low speed at 1 rpm at a constant pressure of 11.7 bar) for 100 drag braking applications were conducted and analyzed. The morphological changes were extensively studied using SEM & EDAX analysis, and 3D microscopy was employed to analyze the brake pads’ surface topography and surface roughness.