Advanced Friction–Wear Behavior of Organic Brake Pads Using a Newly Developed System

Abstract

The objective of this study was to investigate the influence of an advanced performance system on the tribological behavior of brake pad material using a specially designed brake pad tester system following standard SAE J-661. The tribological behavior and friction and wear characteristics of the organic brake pad samples were evaluated. During braking tests, the samples, in contact with a cast iron disk, were studied at different disc speeds, temperatures, and braking cycles under a constant pressure. In order to understand the friction and wear behavior, the unworn surfaces, worn surfaces, and wear debris were characterized by means of scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX). Furthermore, the surface characteristics and differences in the wear modes of the brake pad samples were examined. Wear debris was permitted to deform the brake pad surfaces, leading to friction layers and enabling the estimation of the friction behavior of the brake pads. The results showed that the best friction–wear behavior was obtained with lower braking cycles at low speeds and temperature. Thus, the newly developed brake pad tester system proved very effective in evaluating the performance of the brake pad samples.

Keywords:

• Brake pad system
• wear
• friction coefficient
• microstructure evaluation

Acknowledgements

The authors express their thanks to Hamdi Karakaş at Form Metal and Murat Çevik at HİPAŞ Hydraulic in Istanbul and Uğur Yücel and Durmuş Kır at Kocaeli University.

Additional information

Funding

This study was supported by the Scientific Research Project Unit of Kocaeli University (KOU-BAP-2013/68).