Generation of nanoparticles from friction between railway brake disks and pads

초록

In this study, we measured the size distribution of particles ranging in size from 5.6 to 560 nm that were emitted between brake disks and pads under various braking conditions in order to observe and analyze changes to the resulting particle size distribution over braking time. A peak of 178-275 nm (200 nm Peak) was observed in all braking conditions. However, the generation of spherical particles of a 10 nm range (8.7-13.4 nm) was observed only when the disk speed and brake force were above certain levels and intensified only when speed and brake force further increased. The total number concentration of ultrafine particles (no larger than 0.1 ？m