Ingenieurwissenschaften und zugeordnete Tätigkeiten
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- Posterpräsentation (5) (entfernen)
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- Bremsbeläge (1)
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- Contact resonance (1)
- Force distance curves (1)
- Friction (1)
- Hydrogen (1)
- Longitudinal Wave (1)
- Lubricants (1)
- Metallsulfide (1)
- Niobium carbide (NbC) (1)
Organisationseinheit der BAM
- 9.5 Tribologie und Verschleißschutz (5) (entfernen)
The focus of this study is to evaluate the influence of hydrogen on the friction and wear behavior of a wide range of polymer materials. Thereby, the tribological performance of filled und unfilled polymers from different suppliers were compared at room temperature in air and hydrogen gas (H2) as well as in liquid hydrogen at -235°C (LH2).
In special cases of angle beam ultrasonic measurement the applied transducer has to withstand extreme temperatures. Since the irradiation angle depends on the speed of sound in both the wedge material and the tested object, the developer must take into account the speed of Sound in a wedge material over the whole temperature range of transducers application.
Increasing demand for alternatives to tungsten carbide (WC) cemented carbides as cutting tools, due to the health risks of their wear products WO3 and Co3O4. Niobium carbide (NbC) has a high potential, due to its high wear resitance, high hot hardness and melting point (3520°C), and low solubility in iron alloys.
The motivation and the measurement setup for large fast-scanning piezoresistive cantilevers are presented. The theory behind the measurements of mechanical properties through contact resonance is explained. Results of such measurements on two kinds of polymer are compared to results from force distance curves. Noise, time-dependency and dependency of the results on the vibration mode are identified as challenges of contact resonance.