Research Progress of ZrB2-SiC Based Anti-oxidation Coatings of Cf/C Composites

Owing to their outstanding properties including low density, high thermal conductivity, good ablation and thermal-shock resistances, Cf/C composites have great potentials in various high-end structural application fields such as hypersonic aircraft, aircraft braking systems and rocket nozzles. However, the high oxidation sensitivity of Cf/C composites generally causes some severe problems including serious chemical ablation and significant degradation of service performances. To address these problems, the preparation of ZrB2-SiC-based ultra-high temperature ceramics (UHTCs) coatings on the surface of Cf/C composites is the most effective solution so far. Consequently, this paper reviewed the recent progress in the topics of compositional/microstructural modifications of ZrB2-SiC-based coatings, their oxidation resistances and enhancement mechanisms. Moreover, the principles as well as advantages/disadvantages of popular preparation methods of ZrB2-SiC-based ceramic coatings were summarized. Based on this, the prospects of the promising directions of research and the technique development of this field were forecasted.