The surface microstructural evolution, mechanical properties and ablation behaviors of nitrogen-doped C/C-ZrC-SiC composites by hot isostatic pressing(HIP) have been studied via multiple-characterizations. Results show that the post-treatment of nitridation has significant effects on mechanical strength with grain refinement by virtue of in-situ SEM observations. After nitridation, the dense nano-grained ZrO/Zr₂O and Si₃N₄ ceramics are generated on the top layer. Besides, the evident carbon nanowires exist at boundary of SiC-Si₃N₄ phases. The ZrN/Si₃N₄ eutectic structures are also detected with the transformation of ZrSi phase. What’s more, the ablation-resistant performances are strikingly improved after nitridation-treatment with the highly compact multi-oxide scales obtained.

通过多重表征研究了热等静压(HIP)掺氮C/C-ZrC-SiC复合材料的表面微观结构演变、力学性能和烧蚀行为。结果表明，通过原位扫描电镜观察，氮化后处理对机械强度有显着影响，晶粒细化。氮化后，在顶层生成致密的纳米晶粒ZrO/Zr ₂ O 和Si ₃ N ₄陶瓷。此外，明显的碳纳米线存在于SiC-Si ₃ N ₄相的边界处。ZrN/Si ₃ N ₄随着 ZrSi 相的转变，也检测到共晶结构。更重要的是，氮化处理后获得的高度致密的多氧化物鳞片的耐烧蚀性能得到显着提高。