Coating adherence, friction coefficient, surface temperature, and wear
mass loss are determined for a set of scale reduced steel brake disks
on which NiCr cement based coatings and low conductivity subcoatings
are plasma sprayed. The related pads are made of either sintered iron
copper or sintered aluminum titanate. It is mainly shown that NiCr-Cr3
C2 cermet coating on the disk, coupled with sintered aluminum titanate
pad, leads to good damage resistance and stable friction coefficient
in the simulation of high speed train braking. Low conductivity sublay
ers are also involved and it is found that temperatures in disc or pad
may be also controlled.