Oil-free powertrain test

Oil-free powertrain test

RVS took part in 2004 to this EU-funded research program in Munich, Germany. Please read the highlights from the results and the Official Final Report from June 2004 below:

The results are shown in Figure 6: The uncoated discs failed within the first 7 minutes, the discs run with the RVS® Technology substance failed after ca.15 minutes. Thus the lifetime of these discs was more than double as high as the lifetime of the uncoated discs (page 46).

Figure 6:

Fig36 powertrain

After the test traces of silicum could be detected on the surface. The roughness also decreased from Ra = 0.2 µm before the test to Ra = 0.05 µm after the test (page 57). The original grinding texture perpendicular to the circumferential speed wasn’t visible anymore.

The conclusion from these tests with the RVS Technology substance is, that at a coating building run at boundary lubrication has a positive impact on the life-time under dry lubrication. The disc roughness decreased and traces of silicium could be detected after this coating building run. However, it was not possible to detect a coating in a metallographic section of the disc surface (page 57).

Factors that might affect detection of the coating:

  • RVS modificates the surface structure and integrates with the friction surface metal thus no clear borderline between the coating and base metal can be detected
  • The triboceramic nanocoating doesn’t cover the whole friction surface equally and totally. The ceramic structure is produced where the real contacts take place.
  • The coating film can be and usually is very thin. Perhaps the capacity of measurement device was limited in terms of properties and accuracy.
  • X-Ray or Atom Force microscope pictures taken of a grinded edge chipped from the RVS treated part might be more appropriate for the purpose.


    Oil-free powertrain Test