*Department of Mechanical Engineering, SSM College of Engineering, Komarapalayam, Tamil Nadu, India
**Department of Automobile Engineering, Sri Jagadguru Mallikarjuna Murugharajendra Institute of Technology, Chitradurga, Karnataka, India
***Department of Mechanical Engineering, The National Institute of Engineering, Mysore, Karnataka, India
Online published on 14 February, 2017.
Most of the brake liners used is based on metal fiber reinforced phenol formaldehyde resin, which is a composite of 15–20 constituents and is generally called semi metallic brakes. In practice, asbestos, antimony, and their modified version of organic composite brakes are used which possess good strength, resistance to temperature, chemicals and wear. In the present work, dry sliding wear behaviour of non-asbestos organic (NAO) friction composites namely; antimony and silicon carbide, copper powders (SiC-Cu) filled phenol formaldehyde resin were studied as per the ASTM standards. The dry sliding and abrasive wear tests have been conducted on a pin on disc wear tester. The experiment results reveal that silicon carbide and copper fillers in phenol formaldehyde resin showed increased coefficient of friction and better wear resistance. Further, the wear volume depends on the applied load and sliding velocity. The SiC-Cu filler additive showed better wear resistance under all test conditions compared to that of antimony filled phenol formaldehyde composites. Scanning electron micrographs were used to analyze the fracture and worn surface morphologies of the selected samples.
Phenol formaldehyde composites, Dry sliding wear, Specific wear rate, Scanning electron microscopy
