The oxidation resistance of ultra-high-temperature ceramic material (HfB₂-30 vol%SiC)-2 vol%rGO (rGO: reduced graphene oxide) under long-term exposure (2000s) to a supersonic air flow has been studied. The ceramics were obtained by reactive hot pressing of HfB₂-(SiO₂-C)-rGO composite powder at a temperature of 1800°C (pressure 30 MPa, holding time 15 min, Ar). The surface temperature of graphene-modified ceramics under the influence of heating by high-enthalpy air flow (heat flow q reached 779 W·cm^–2) did not exceed 1700°C, which is 650–700°C less than for the HfB₂-30 vol%SiC baseline ceramics. This may be related to an increase in the efficiency of heat transfer from the sample to the water-cooled module, due to the higher thermal conductivity of the rGO-containing material. Thereby, a decrease in the material degradation degree has been noted, i.e. decrease in the recession rate and decrease in the total thickness of the oxidised ceramic layer by tenth. The peculiarities of the oxidised surface and near-surface region microstructure upon aerodynamic heating of the graphene-modified ceramic material, have been shown.

研究了超高温陶瓷材料 (HfB ₂ -30 vol%SiC)-2 vol%rGO（rGO：还原氧化石墨烯）在长期（2000 秒）超音速气流下的抗氧化性。通过在1800℃（压力30 MPa，保温时间15 min，Ar）下反应热压HfB ₂ -（SiO ₂ -C）-rGO复合粉末获得陶瓷。石墨烯改性陶瓷在高焓空气流加热（热流q达到779 W·cm ^–2）的影响下表面温度不超过1700°C，比HfB低650-700°C ₂-30 vol% SiC 基线陶瓷。这可能与从样品到水冷模块的热传递效率的增加有关，因为含 rGO 的材料具有更高的热导率。因此，已经注意到材料降解程度的降低，即衰退速率降低并且氧化陶瓷层的总厚度降低了十分之一。已经显示了石墨烯改性陶瓷材料在空气动力学加热时氧化表面和近表面区域微观结构的特性。