Phenomenological consideration of sintered aluminum matrix composites for use in vehicle friction brake linings

• Applicants: Professor Dr.-Ing. Ralph Mayer; Professor Dr.-Ing. Guntram Wagner
• Subject Area: Glass, Ceramics and Derived Composites ; Synthesis and Properties of Functional Materials
• Term: since 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 517907454

The main goal of the planned research project is to gain knowledge about the suitability of selected AMC based on the alloy EN AW-5083 (AlMg4.5Mn0.7) with reinforcement particles based on SiC as a basis for the production of vehicle brake linings. The aim is to show to what extent future requirements for vehicle friction brakes with regard to changed operating conditions and a reduction in brake dust or the proportion of toxicological substances can be met. The following research needs and sub-goals can be derived from this: + Research, analysis and standardization of new test procedures as a response to changed framework conditions for the functional verification of the test specimens in tribological applications under realistic environmental and operational conditions. + The process-structure-property correlation should be described in a scientifically reproducible manner using microstructural changes. The microstructural, thermotribological and mechanical behavior is of fundamental scientific interest. + In addition, the influence of the complex microstructural behavior when the particles are varied (different particle morphologies, proportions, pre-treatment states) must be shown. The sintering behavior between the particle types of the composite powders should also be understood. + The connections between micro- and macrostructural properties on the modified AMC are comprehensible and examined for the first time for use as a friction lining. The friction lining demonstrator should be adjusted using modified AMC and the influence on the boundary layer dynamics should be examined. + Development of a friction lining model using the researched relationships to investigate the boundary layer dynamics in the friction event area for the prediction of the friction coefficient, temperature and wear behavior.

• DFG Programme: Research Grants