Passive Oxidation Behavior of ZrB2-SiC Eutectic Composite Prepared by Arc Melting
ZrB2-SiC composites were prepared by arc melting using ZrB2 and -SiC powders as raw materials and their oxidation behavior were investigated. The eutectic composition of the ZrB2-SiC system was ZrB2-58.5mol%SiC and the melting point temperature was about 2570 K. At 1673 K mass gain was observed in the oxidation of ZrB2-SiC eutectic composition and the mass gain rate increased with decreasing Ptot. The oxide scale consisted of an amorphous SiO2 layer, a ZrO2-SiO2 eutectic-like layer and a Si-deficient layer.
Katsutoshi Komeya, Yi-Bing Cheng, Junichi Tatami and Mamoru Mitomo
R. Tu et al., "Passive Oxidation Behavior of ZrB2-SiC Eutectic Composite Prepared by Arc Melting ", Key Engineering Materials, Vol. 403, pp. 217-220, 2009