Plasma-sprayed La₂O₃-modified HfC-SiC (HSL) coating was prepared on SiC-coated carbon/carbon composites to obtain an elevated ablation resistance under a heat flux of 2.38 MW/m². The elastic modulus of sprayed HSL coating is about 140.97 GPa, 41.48 % greater than HfC-SiC (HS) coating. HSL coating also performed superior ablation resistance evidenced by integrated scale and stable ablation rates. Besides, the elastic modulus and adhesion strength of ablated HSL coating gained 65.9 % and 26.9 % increase compared with HS coating. Its reliable service performance is primarily attributed to the formed scale constituted by HfO₂ and La₂Hf₂O₇ particles encapsulated by La-Si-O glass.

在2.38 MW / m ²的热通量下，在SiC涂层的碳/碳复合材料上制备了等离子喷涂La ₂ O ₃改性的HfC-SiC（HSL）涂层，以提高耐烧蚀性。喷涂的HSL涂层的弹性模量约为140.97 GPa，比HfC-SiC（HS）涂层大41.48％。HSL涂层还表现出优异的抗烧蚀性，这由集成的氧化皮和稳定的烧蚀率证明。此外，烧蚀后的HSL涂层的弹性模量和粘附强度比HS涂层分别提高了65.9％和26.9％。其可靠的服务性能主要归因于HfO ₂和La ₂ Hf ₂ O ₇形成的氧化皮。 粒子被La-Si-O玻璃封装。