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7393 |
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Mechanical and thermokinetic description of innovative coating systems |
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Jurica Filipovic / Technical University of Darmstadt, Germany M.Sc. Marcel Adam / TU Darmstadt / MPA-IfW, Germany Dr.-Ing. Christian Kontermann/ TU Darmstadt / MPA-IfW, Germany Prof. Dr.-Ing. Matthias Oechsner/ TU Darmstadt / MPA-IfW, Germany |
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The efficient operation of thermal power plants such as gas turbine engines and the optimization of the underlying conversion processes are of high relevance concerning the increasing importance of environmental protection. Since this challenge is primarily to be tackled with higher operating temperatures, numerous research projects are designed to optimize or even reinvent novel coating systems, which is the main purpose of the RTG “MatCom – ComMat”. The development of novel diffusion and nanocomposite based coating systems requires advanced methods for material property characterization and the description of potentially occurring failure mechanisms. In order to assess the behavior under extremely high temperatures (T >1300 °C) and in aggressive media, both the investigation of system-internal interactions between the individual layer components and the description of the macroscopic material system behavior are of essential importance. In order to make a decisive contribution to the RTG, mechanical bending and pressure tests on first candidate systems in as-built and annealed conditions are being carried out and accompanied by advanced in-situ deformation and damage measurement techniques. This experimental study is supported by a code-based thermokinetic simulation approach to investigate the interdiffusion and oxidation behavior of the coating components. |