Sustainability and long life-duration products in combination with efficiency improvement and reduction of CO2 emissions are getting more and more important. Many high temperature processes are realized only by use of technical ceramic or ceramic matrix composites. Examples can be found in space and aeronautical applications driven by weight saving and increasing gas temperature or thermo-mechanical loads in brake discs. In these processes, high thermal gradients or fast temperature changes occur leading to high thermo-mechanical loads. By thermo-mechanical simulation test results are utilized for component design.