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The following items were demonstrated in test series: Graphite coatings: The test results with SUS440C bearings showed that graphite film break occurred under both hydrogen and nitrogen atmosphere. MoS2 coatings: SUS440C bearings: It showed better lubrication performance in hydrogen atmosphere than in nitrogen atmosphere. MoS2 coating films broke in early stage under nitrogen atmosphere with high contact pressure condition. It showed stable lubrication performance under hydrogen with high temperature of 200°C. Hybrid ceramic bearings: At the early stage of the rotation, there is almost no transfer film for self lubrication on the ball surface. The bearing showed good lubrication performance with MoS2 + PTFE coating film in advance at high contact pressure.
Aerosol emissions from brake pads are evolving into the focus of industrie and regulation. Many institutes are extending their dynamometer test stands with aerosol measurement equipement. While this is in general a good developement, the details of aerosol measurement and the special problems in the case of brake pad emissions need some special attention. The instrumentation can not be used out of the box and the important parameters will be highlighted in this presentation.