Einstellbare tribologische Eigenschaften in Metall/Kunststoff-Gleitpaarungen durch Kombination hybrider kunststoffbasierter Werkstoffe auf unterschiedlichen Längenskalen

• Antragsteller: Professor Dr.-Ing. Alois K. Schlarb
• Fachliche Zuordnung: Polymere und biogene Werkstoffe und darauf basierende Verbundwerkstoffe ; Kunststofftechnik ; Materialien und Werkstoffe der Sinterprozesse und der generativen Fertigungsverfahren
• Förderung: Förderung von 2019 bis 2022
• Projektkennung: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 428934631

• Erstellungsjahr: 2023

Zusammenfassung der Projektergebnisse

The results of the tribological investigations in this project clearly show the feasibility of a design approach for manufacturing high-performance tribocomponents for a wide pv-load spectrum by using a macroscopic combination of micro-modified tribocomposites. The macroscopic combinations can benefit from their individual components and thus exhibit excellent friction and wear behaviors in the wide pv-load range. The tribological behavior is strongly dependent on geometric variants. Among the various geometric variants, the tribocomposite combinations in parallel configuration show overall the most impressive tribological performance by sliding against a steel ring on a block-on-ring tribometer in a wide pv-load. Generally, the friction and wear behavior of the combinations follow their better component in the respective load range or are even better than both of their components in certain load ranges, thus exhibiting excellent tribological performance in the wide pv-load range. Notably, the possible maximum loads are mainly determined by the better partners, which unveils the potential for material cost advantages. In combination with a material that works well under high load conditions, less resilient tribological materials with low cost can also be used in a wide load condition in practical applications. The tribological properties of the specimens with a metal backing benefit from the much higher thermal conductivities and thus the different heat balance compared to the standard specimens consisted entirely of the tribocompounds. Because of the favorable heat balance and different stiffness, the tribocomposite/metal multi-combinations in parallel configuration exhibit further improvement in tribological properties. Based on the knowledge gained in the experiments, an analytical model and a numerical model were developed and verified to describe the relation between the properties of the combinations in parallel configuration and their components. The analytical model considering local load condition and stiffness of the composite components helped us to predict the tribological properties of the combinations with low computational effort. The Numerical simulation with higher computational complexity enables us to determine the local load condition and local friction behavior and therefore understand in-depth of correlation between mechanical, thermal and tribological mechanisms. By analysing experimental results and using these models, we were able to identify the component that exhibits the dominant tribological mechanism and calculate the tribological properties of the combinations at varying pv loads. We hope that the results of the project will guide and facilitate the further development of highperformance polymeric tribocomponents. Based on an analysis of the respective application with regard to the installation situation, the expected loads and the available materials, the user should be able to make a well-founded decision regarding the combination of materials and the arrangement of the multi-area system.

Projektbezogene Publikationen (Auswahl)

• Einfluss der Faserorientierung auf die tribologischen Eigenschaften von PEEK-Compounds im Gleitkontakt mit Stahl. Tribologie- Fachtagung, online, 28.-30. September 2020.
  Huang M., Hua C., Lin L.Y. & Schlarb A.K.
  
• Schichthaftung und Faserorientierung bei der Verarbeitung von thermoplastbasierten Verbundwerkstoffen im FFF-Verfahren. AVK-DGM GA Additive Fertigung, online, 31. Mai 2021.
  Huang, M & Schlarb, A.K.
  
• Improved performance of polymer-based tribosystems by macroscale combination of materials. Tribologie-Fachtagung, Göttingen, 26.-28. September 2022.
  Huang, M.; Ecke, N. & Schlarb, A.K.
  
• Performance improvement of polymer-based tribosystems by combining materials on the macroscale. Sitzung des DGM Fachausschusses "Polymerwerkstoffe" Themenschwerpunkt "Hochleistungspolymere und Tribologie", Kaiserslautern, 23. Juni 2022.
  Huang, M.; Ecke, N. & Schlarb, A.K.
  
• High-performance tribo-components through combination of materials on the macroscale. Tribology International, 187, 108779.
  Huang, M.Z.; Ecke, N. & Schlarb, A.K.