An effective monolayer SiC-HfB₂-Si coating for long-time oxidation protection of C/C composites was designed and prepared by a combined technique of slurry dipping and gaseous Si infiltration (SD + GSI). This coating is dense and adheres well with the C/C substrate, which is ascribed to the formed zigzagged SiC transition layer. After oxidation at 1773 K in static air for >538 h, the mass loss of SiC-HfB₂-Si coated samples is only 0.69%. By thermodynamic calculation, the oxidation process of SiC-HfB₂-Si coated samples is mainly controlled by oxygen diffusion, and the stable oxidation products are HfO₂ + B₂O₃ + SiO₂ + CO. The excellent oxidation protective ability is mostly attributed to the formation of a composite Hf-Si-O glass layer on the coating surface to heal cracks and pores.

设计了一种有效的单层SiC-HfB ₂ -Si涂层，该涂层通过浆料浸入和气态Si渗透（SD + GSI）相结合的技术来制备，用于C / C复合材料的长期抗氧化保护。该涂层致密并与C / C基板良好粘合，该C / C基板归因于所形成的锯齿形SiC过渡层。在1773 K的静态空气中氧化超过538小时后，SiC-HfB ₂ -Si涂层样品的质量损失仅为0.69％。通过热力学计算，SiC-HfB ₂ -Si涂层样品的氧化过程主要受氧扩散控制，稳定的氧化产物为HfO ₂  + B ₂ O ₃  + SiO ₂ 优异的抗氧化保护能力主要归因于在涂层表面形成的复合Hf-Si-O玻璃层，可以治愈裂纹和孔隙。