WEB Photon ceramics enable lightweight 4.0Wednesday (01.01.2020) 00:00 - 00:30 Part of:
According to different scenarios 60 % of all automobiles will be still equipped with a combustion engine in 2040 , whereas enhanced motor fuels and a mixture of the power train will play an important role. Therefore, a special attention should be paid on the optimization of the tribological behavior in the combustion engine system by decreasing the friction and wear losses to achieve an environmental shielding.
This study deals with a novel processing of the plasma electrolytical oxidation (PEO), which results in a dense and hard surface on Al casting alloys leading to a very low wear on the coating’s side under different tribological testing conditions. Particularly, the interaction with novel low viscosity oils as lubricants leads to impressive results regarding friction and wear behavior. For further modification of those surfaces the Direct Laser Interference Patterning (DLIP) technique was chosen to induce different structures on the PEO surface. To understand the influence of the laser structuring on the PEO surface and the interplay with different loads and lubrication modes, pin-on-disc tests were performed. The resulting surfaces and the wear mechanisms are examined by SEM and EDX techniques. Under optimized conditions, a further decrease of the friction could be achieved accompanied by a lowered wear of the tribological steel partner.
 Deutsches Zentrum für Luft- und Raumfahrt, Aral AG, Tankstelle der Zukunft 2019.