Oxidation behavior of SiBCN-Zr composites at 1500 °C prepared by reactive spark plasma sintering.

The oxidation behavior of SiBCN-Zr composites prepared through incorporating sol-gel processing with spark plasma sintering (SPS) was studied in detail. It is indicated from results that a dense amorphous SiO 2 film was formed on the samples superficially in the course of oxidation, which avoided the sample from being further oxidized. The oxidation of ZrB 2 would boost the oxygen to be diffused, which aggravates the oxidation. Amorphous SiO 2 would fill up the pores and avoid ZrB 2 particles from being further oxidized. A preferable anti-oxidation behavior was also manifested by BN(C) arising from the formation of B 2 O 3 phases. [ABSTRACT FROM AUTHOR]