Characteristics and Mechanisms of Dynamic Oxidation for ZrB2-SiC Based UHTC
The present study focuses on the dynamic oxidation resistance of five representative ZrB2-SiC based ultra-high temperature ceramics (UHTCs): ZrB2-SiC, ZrB2-SiC-Si3N4, ZrB2-SiC-TiB2, ZrB2-SiCHfB2 and ZrB2-SiC-ZrC using oxyacetylene torch and arc jet testing. The effects of second phase incorporation (Si3N4, TiB2, HfB2, ZrC) on oxidation resistance were compared and analyzed. The mechanism of oxidation based on experimental results and thermodynamic calculations were explored. Some approaches to improvement of oxidation resistance and future directions of UHTC are also presented.
Wei Pan and Jianghong Gong
J. C. Han et al., "Characteristics and Mechanisms of Dynamic Oxidation for ZrB2-SiC Based UHTC", Key Engineering Materials, Vols. 368-372, pp. 1722-1726, 2008