Abstract
A brake system must provide high and stable friction, low wear and noise- and vibration-free performance for reasons of safety, comfort and durability. These performance characteristics can be influenced by the friction film (glaze) formed on the sliding surfaces of the brake rotor and pads. This investigation was undertaken to study friction film formation and destruction between a semimetallic friction material formulation and a gray cast iron disk, and its influence on passenger car disk brake behavior. Brake rotor surface roughness, the ease or difficulty of friction film formation, its formation mechanism, its effect on friction and wear, and brake squeal are discussed.
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