Case Studies on Characterization of Brake Pad Surfaces Using Scanning Electron Microscope

Praveenkumar Babu and Darius Gnanaraj Solomon

Abstract

Scanning electron microscope (SEM) is the most important tool used for characterizing brake pad surfaces. Case studies on characterizing five different friction composite formulations are presented in this paper. Different features of SEM are related to explain the increase or decrease of friction and wear values. Different wear mechanisms operating at different temperatures are discussed. Special features in SEM results are highlighted for better understanding. Surface morphology, loose particles, friction films, primary and secondary plateaus are identified on worn surfaces.  The case studies presented in this paper are expected to impart knowledge and skills to practicing R & D Engineers to characterize brake pad surfaces.