HfC coatings were deposited on the surface of carbon/carbon (C/C) composites and CVD-SiC coating by low-pressure chemical vapor deposition (CVD), respectively. The effects of two substrates on the microstructure, phase composition and preferred orientation of HfC coatings were investigated in detail. Results showed that HfC coatings deposited on two substrates inherit their own substrate surface characteristics. After ablation for 90 s, the HfC coating prepared on CVD-SiC coating has better ablation resistance under oxyacetylene flame with heat flux of 2.4 MW/m², because the transition layer can effectively relieve the damage caused by thermal stress.

HfC 涂层分别通过低压化学气相沉积 (CVD) 沉积在碳/碳 (C/C) 复合材料和 CVD-SiC 涂层的表面。详细研究了两种基材对 HfC 涂层的微观结构、相组成和择优取向的影响。结果表明，沉积在两个基材上的 HfC 涂层继承了它们自己的基材表面特性。烧蚀90 s后，在CVD-SiC涂层上制备的HfC涂层在热通量为2.4 MW/m ^{2 的}氧乙炔火焰下具有更好的抗烧蚀性，因为过渡层可以有效缓解热应力造成的损伤。