13] systems has been investigated rather intensively within the last two decades. Thus,
PDCs demonstrate excellent oxidation resistance as compared to state-of-art CVD SiC and Si3 N4 ceramics [14]. For instance, SiAlCN-based ceramics synthesized from a polysilazane polymer modified with an Al alkoxide exhibits a parabolic behavior, with oxidation rates being one order of magnitude lower than those determined for CVD SiC or Si3 N4 [9].