Hu Ping, Gui Kaixuan, Yang Yang, Dong Shun, Zhang Xinghong
Science and Technology on Advanced Composites in Special Environment Laboratory, Harbin Institute of Technology, Harbin 150001, China.
Materials (Basel). 2013 Apr 29;6(5):1730-1744. doi: 10.3390/ma6051730.
The ablation and oxidation of ZrB₂-based ultra high temperature ceramic (UHTC) composites containing 10%, 15% and 30% v/v SiC were tested under different heat fluxes in a high frequency plasma wind tunnel. Performance was significantly affected by the surface temperature, which was strongly dependent on the composition. Composites containing 10% SiC showed the highest surface temperature (>2300 °C) and underwent a marked degradation under both conditions. In contrast, composites with 30% SiC exhibited the lowest surface temperature (<2000 °C) and demonstrated excellent ablation resistance. The surface temperature of UHTCs in aerothermal testing was closely associated with the dynamic evolution of the surface and bulk oxide properties, especially for the change in chemical composition on the exposed surface, which was strongly dependent on the material composition and testing parameters (, heat flux, enthalpy, pressure and test time), and in turn affected its oxidation performance.
在高频等离子体风洞中，对含有10%、15%和30%（体积分数）SiC的ZrB₂基超高温陶瓷（UHTC）复合材料在不同热流下的烧蚀和氧化进行了测试。性能受到表面温度的显著影响，而表面温度强烈依赖于成分。含有10%SiC的复合材料表现出最高的表面温度（>2300°C），并且在两种条件下都经历了明显的降解。相比之下，含有30%SiC的复合材料表现出最低的表面温度（<2000°C），并显示出优异的抗烧蚀性。超高温陶瓷在气动热测试中的表面温度与表面和体相氧化物性能的动态演变密切相关，特别是暴露表面化学成分的变化，这强烈依赖于材料成分和测试参数（热流、焓、压力和测试时间），进而影响其氧化性能。
