The demand for environmentally and resources-friendly processes as well as higher efficiency in thermal plants and machinery requires an increase of operating temperatures. However, processes conducted at high temperatures and often in complex atmospheres lead to increasing demands on the high temperature corrosion resistance of the materials used. The main research objectives of the "high temperature materials" group at DFI are material analysis and development in the field of aggressive, high temperature environments. Within this research field, we focus on the development of metallic and ceramic protective coatings and innovative material systems appropriate for extremely aggressive service conditions (e.g. chlorine, sulphur, bromine, vanadium, and carbon-rich environments) and operation temperatures up to 1800 °C.
In order to produce such coatings, the material surface is enriched with protective elements by diffusion, which later prevent substrate corrosion during high temperature exposure
Computer simulation tools are used to predict the material behaviour during manufacturing as well as their lifetime during their operation at high temperatures
The replacement of Ni-based alloys by lighter materials in aviation turbines can decrease the CO2 emissions
Providing high temperature protective coatings with additional properties such as self-cleaning, thermal insulation or improved aerodynamics can increase the quality and the efficiency of different engineering processes
New developments show that a slight change in the chemical composition near the surface region of different materials induces a change in the reaction mechanisms and hence in their corrosion behaviour as well
The work group also shares its methods and experience with industry and offers professional support and advice regarding industrial material problems and their explanation
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