In order to further expand the application of SiC/SiC composites in the hot-end components for advanced aerospace engines, a self-healing SiC/(SiC-SiBCN)x composite prepared by CVI + PIOP has been tested for their creep behavior at 1200 °C with the partial pressure of 12 kPa H₂O: 8 kPa O₂: 80 kPa Ar. For the samples tested under low stresses, the load is borne by a load-bearing region, so that the secondary stage of creep curves can be subdivided into several small steps. Besides, it is found that the number of defects in SiC/(SiC-SiBCN)x composites is predominantly related to the stress level while the size of the defects is related to the creep time. Our findings provide important analytical data related to the creep behavior of the SiC/(SiC-SiBCN)x composite material and contribute to the further development of CMCs with outstanding mechanical properties and corrosion resistance even under harsh environments.

为了进一步扩大SiC / SiC复合材料在先进航空发动机热端组件中的应用，已对CVI + PIOP制备的自修复SiC /（SiC-SiBCN）x复合材料在1200℃时的蠕变行为进行了测试。 °C，分压12 kPa H ₂ O：8 kPa O ₂：80 kPa Ar。对于在低应力下测试的样品，负载由一个承载区域承担，因此蠕变曲线的第二阶段可以细分为几个小步骤。此外，发现SiC /（SiC-SiBCN）x复合材料中的缺陷数量主要与应力水平有关，而缺陷的大小与蠕变时间有关。我们的发现提供了与SiC /（SiC-SiBCN）x复合材料的蠕变行为有关的重要分析数据，即使在恶劣的环境下，仍具有出色的机械性能和耐腐蚀性的CMC得以进一步发展。