Influence of the microstructure of silicon nitride on the mechanical behavior in roller applications
The subproject B5 deals with the development of silicon nitride ceramics. One goal in this stage of research is a better understanding of relevant toughening mechanisms, like grain bridging, during crack extension. Another goal is to understand the degradation of the toughening mechanisms during cyclic loading, denoted as cyclic fatigue. In this context the entire crack growth resistance curves (R- curves) are measured with different methods.