TY - JOUR A1 - Österle, Werner A1 - Prietzel, Claudia A1 - Dmitriev, Andrey T1 - Investigation of surface film nanostructure and assessment of its impact on friction force stabilization during automotive braking T2 - International journal of materials research N2 - The unique nanostructure formed during severe as well as moderate braking on the surface of brake discs was investigated by conventional and analytical Transmission Electron Microscopy. In both cases nanocrystalline magnetite mixed with carbon nanoinclusions and minor amounts of other pad constituents were identified. On the basis of these observations the friction performance of a single micro-contact was simulated with the method of Movable Cellular Automata. Inspite of a simplified nanostructure which was examined in two dimensions only, the calculated mean coefficient of friction fitted well to the value usually demanded for automotive braking. Furthermore, the model predicts that oxide films without soft nanoinclusions are not capable of providing smooth velocity accommodation at the pad–disc interface and thus lead to unstable friction behaviour. PB - Carl Hanser CY - München KW - Friction KW - Third body film KW - Nanostructure KW - MCA-model KW - EFTEM PY - 2010 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/22343 AN - OPUS4-22343 SN - 1862-5282 VL - 101 IS - 5 SP - 669 EP - 675 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany