Morphology of fiber on physical and tribological properties of brake pads 2019-01-1440
This study investigates the effects of fiber length on hardness, porosity, specific gravity, wear, and friction characteristics of automotive brake materials. Kevlar ([-CO-C6H4-CO-NH-C6H4-NH-]n) and barium sulfate (BaSO4) were used as a synthetic fiber and a filler in brake pad materials, respectively. In the experiment, friction materials with three different lengths of Kevlar (1.10, 1.15 and 1.22 mm) were prepared using the formulated material composition. Bulk density values of mixture, before preforming from those mixtures were observed. Homogeneity in terms of density, hardness, porosity, specific gravity, specific wear rate and coefficient of friction of the finished brake pads were determined. In addition, the worn surfaces of brake pads and the debris were studied using Scanning Electron Microscopy (SEM). The correlation between fiber morphology and physical and tribological properties of brake pads were discussed and reported in order to modify the criteria for raw material selection.