Development and fabrication of complex laser surface textures for lubricant guidance in frictional contacts

• Applicant: Professor Dr.-Ing. Andrés Fabián Lasagni
• Subject Area: Coating and Surface Technology ; Synthesis and Properties of Functional Materials
• Term: since 2026
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 574358914

Surface texturing has been used manifold in the past to improve the tribological performance of surfaces by increasing e.g. the hydrodynamic pressure or creating reservoirs/traps for both lubricant and wear particles. In this context, different structuring methods have been applied to improve the tribological performance of piston rings in cars, roller bearings or magnetic storage devices. Nevertheless, surface textures located directly inside the contact zone are subjected to wear and once these topographical features are removed, the beneficial effects are lost. This is especially true for harsh operating conditions such as those occurring for starved tribological contacts. In this project, we aim to answer thoroughly how asymmetrical, as well as complex surface structures can be used for controlling lubrication conditions to avoid starved lubrication phenomena in machine elements such as high speed roller bearings amongst others. For answering this main question, a research program, including the development of novel surface structures supported by advanced simulation tools of tribological properties as well as outstanding characterization equipment has been developed. This project follows a unique holistic approach, in which expertises in laser manufacturing, tribology and fluid mechanics are combined synergistically for the first time in this particular research field. We intend to answer the basic governing mechanisms of directionalized lubricant droplet spreading with a potential future application in machine elements at a later stage.

• DFG Programme: Research Grants
• International Connection: Austria
• Partner Organisation: Fonds zur Förderung der wissenschaftlichen Forschung (FWF)
• Cooperation Partner: Professor Dr.-Ing. Carsten Gachot