Mechanism-based understanding of the transfer of plastic-bonded fluid-free lubricant systems in the lubricant body-to-body contact and its influence on the tribological properties in highly loaded body-to-body contacts

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The overall scientific objective of the proposed subproject is to describe the mechanisms of friction and wear with respect to tribofilm formation in highly loaded tribological systems in which the lubrication of metal friction pairs is achieved by plastic-bonded solid lubricants. Specifically, the relationship should first be examined and evaluated in simple contact geometries. In a second stage, the general results are transferred to technically proven contact geometries in machine elements. Particular attention is paid to the provision and transfer of solid lubricant in the plastic / metal interaction. The basis for this are the following work objectives:- Characterization of tribofilm formation in solid lubricant / metal contact under different operating conditions (surface pressure, speed and temperature as well as counter topography) and its influence on the transfer process into and in between metal / metal contact with high contact pressure in different model test systems.- Description of the interaction of solid lubricant composition, surface pressure, speed, temperature and tribofilm formation. - Investigation of the mechanisms for tribolayer formation and validation of the knowledge gained in model testing by component testing. - Explaination of the mechanisms of tribolayer formation and validation of the knowledge gained in model testing using component testing.- Comparison of the delivery and transfer processes of tribo films in different tribosystems.- Identification of the relationships and formulation of directly implementable results for application.The proposed project covers the fundamental mechanistic investigation of the provision and transfer processes of thermoplastic-based solid lubricants in high mechanical stress tribological systems. A successful project can not only gain a deeper understanding of the mechanisms of tribofilm formation, but also enable a solid lubricant system based on thermoplastics for industrial application. The proposed project covers the fundamental mechanistic investigation of the delivery and transfer processes of polymer bonded solid lubricants tribological systems at high surface pressure. A successful project, due to a deep understanding of the mechanisms of tribofilm formation, ultimately allows the transfer of the concept to industrial application.