This test device was developed to determine friction factors under vacuum/high vacuum and high temperature conditions up to 700°C for lifetime tests and benchmarking of different materials. The sample temperature is measured on-line, the torque measurement is done punctual (individual interval 10 > 120 s) using following method: the rotation is done CW and CCW for a defined number of rotations, then a difference measurement is done. This is necessary for piezo sensors which are not usable for on-line measurement due drifting of the signal. Post-Analysis may cover measurement of wear by topographic means. Investigation of surface morphology or material transfer is possible using SEM/EDX. Changes in the subsurface microstructure can be analysed locally resolved by EBSD (Electron Back Scattering Diffraction). The device is fully PC-controlled. On-line-data acquisition offers to post-process data, e.g. for automatic calculation of friction coefficients in running-in or steady state, as well as benchmark of different materials under high vacuum and high temperature conditions.
Measurement of
Friction force / coefficient (punctual, individual interval
10 > 120 s)
- Temperature (on-line)
- Wear (geometric or mass loss)
Geometry: cone-disk-on-ring
Mounted setup with inductive heating
Full test setup
Specifications | |
Test | Measurement of
|
Temperature | from RT up to + 700 °C |
Load (contact pressure) | 3 to 30 N (50kPa > 300kPa for Cone-ring-on-disk, higher hertzian pressure up to MPa range possible depending on radius of pin-on-disk) |
Speed / Motion | 0.001 > 0.2 m/s (1 > 150 rpm) |
Environments | Vacuum to high vacuum (10^3 > 10^5 mbar depending on outgassing behaviour of sample) |
Samples | Cone-ring-on-disk, pin-on-disk |
Accuracy | Torque 10 Nm max (piezo) Sample temperature ± 10 °C Load ± 0.1 N |