Abstract
An experimental investigation was carried out to examine the tribological behavior of NAO (non-asbestos organic) type brake
linings containing different volume ratios of graphite and antimony trisulfide (Sb2S3). A scale dynamometer was used for friction tests
and particular emphases were given to the effect of applied pressure, sliding speed, and temperature on the coefficient of friction
according to the relative amounts of the two solid lubricants. Results showed that the brake linings with both solid lubricants
exhibited better friction stability and less speed sensitivity than the friction materials containing a single solid lubricant. In particular, the
brake lining containing higher concentrations of graphite showed better fade resistance than others during high-temperature friction
test.