Material Compounds from Composite Materials for Applications under Extreme Conditions

Project Leaders

  • Nathalie Thor, Astrid Pundt and Hans-Joachim Kleebe

Description

In order to be able to develop novel material compounds from composite materials, a profound understanding of the microstructure as well as the characterization of the present phases and the corresponding phase distribution is indispensable, in addition to the synthesis route and the specific heat treatment of the different materials. It is essential to understand and being able to interpret the microstructural evolution of the composite materials in detail. With the help of electron microscopic investigations (SEM and TEM), a fundamental understanding of the microstructures that have altered as a result of the thermal treatments will be achieved. Hereby, both the microstructure evolution and the chemical development of the composite materials of the investigated material systems play a decisive role. The main focus of this subproject is the characterization of bulk composites with changing chemical compositions under different heat treatments. Two material systems are investigated by electron microscopy: (i) polymer-derived ceramic nanocomposites and (ii) ultra-high temperature alloys.

Fig. 1: a) SEM-SE and b) TEM-BF images of silicon nitride whiskers and Hf-Ta-metal carbonitrides in polymer-derived ceramic nanocomposites (PDC-NCs).
Fig. 1: a) SEM-SE and b) TEM-BF images of silicon nitride whiskers and Hf-Ta-metal carbonitrides in polymer-derived ceramic nanocomposites (PDC-NCs).
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