Oxidation behaviour of zirconium diboride–silicon carbide ceramic composites under low oxygen partial pressure

Preparation and anti-oxidation characteristics of ZrSiO4–SiBCN(O) amorphous coating

“…The formation of low viscosity borosilicate glass on the surface of the coating steps from this process, and it will spread along surface of the coating rapidly. Hence, the partial pressure of oxygen is low in the inner part of the coating, which would result in the active oxidation of SiC (SiC + O 2 → SiO + CO) and the evaporation of SiO in return [19,25,34]. This oxidation mechanism is distinctively different from that of pure SiBCN.…”

Oxidation of ZrB2–SiC‐Graphite Composites Under Low Oxygen Partial Pressures of 500 and 1500 Pa at 1800°C

“…This observation is consistent with previous analysis. 18 Tian et al 18 reported on the oxidation behavior of ZrB 2 -SiC composites under low oxygen partial pressure at 1500°C. These results suggest a parabolic trend indicating that the kinetics of the oxidation of ZrB 2 -SiC composites is diffusion controlled when the ZrB 2 -SiC composite is oxidized at an oxygen partial pressure of 1500 Pa.…”

Oxidation behavior of ZrB2/SiC laminates: Effect of composition on microstructure and mechanical strength

“…18 From the above it can be inferred that at present there is not an ideal material to be used for oxidation protection in re-usable TPSs since such a kind of material is expected to operate in a wide range of temperature; in fact SiC proved to be suitable for this purpose at temperatures below 1600 • C while ZrB 2 -SiC composites are believed to behave better at very high temperatures (for instance around 2200 • C [28]) as well as under low partial pressure of oxygen. 29 On the other hand a laminate with alternating layers of SiC and ZrB 2 /SiC composite could display high oxidation resistance under a variety of environmental conditions. In addition ceramic laminates showing weak interfacial bonds between the layers can display improved toughness over monolithic ceramics because the interfaces and the residual stresses cause crack deflection phenomena that increase the fracture work.…”