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HfC具有抗氧化、耐烧蚀、导热系数低和固态无相变等优异的性能，是C/C复合材料理想的高温涂层材料之一。但HfC涂层与C/C复合材料之间存在一定的热膨胀系数失配，在热循环冲击下可能从基体上脱落。在HfC涂层与C/C基体之间加入热膨胀系数适中的过渡层(如SiC、TiC等)形成HfC基涂层，过渡层可缓解涂层与基体之间的热应力，高温反应生成的氧化物可有效抑制氧的渗透，提高材料的耐烧蚀性能，延长材料的使用寿命。本文综述了HfC基涂层的制备、组织结构及抗烧蚀性能，并对HfC-PyC梯度涂层进行了热应力模拟，结果表明，在C/C基体与HfC涂层之间增加成分逐步变化的梯度过渡层，可以有效减小基体与涂层之间的残余应力。
Abstract：HfC has excellent properties such as antioxidant, ablation resistance, low thermal conductivity, and no phase transformation in solid state, making it one of the ideal high-temperature coating materials for C/C composites.However, there is a certain thermal expansion coefficient mismatch between the HfC coating and the C/C substrate, which may cause the coating to fall off from the subs-trate under thermal cycling shock.By introducing a transition layer(such as SiC,TiC,etc.) with a moderate thermal expansion coefficient between the HfC coating and the C/C substrate, a HfC-based coating can be formed.The transition layer can alleviate the thermal stress between the coating and the substrate.Oxides generated at high temperatures can effectively inhibit oxygen permeation, improve the ablation resistance of the material, and extend the service life.This paper reviews the preparation, microstructure, and ablation resistance of HfC-based coatings and presents a thermal stress coupling simulation of HfC-PyC gradient coatings.The results show that adding a gradient transition layer with gradually changing composition between the C/C substrate and HfC coating can effectively reduce the residual stress between the substrate and coating.
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基本信息:
DOI：10.14078/j.cnki.1001-3741.2026.01.003
中图分类号:TB332;TB306
引用信息:
[1]王献,汪星强,魏燕,等.C/C复合材料表面HfC基涂层的研究进展[J].炭素技术,2026,45(01):18-23+29.DOI:10.14078/j.cnki.1001-3741.2026.01.003.
基金信息:
云南贵金属实验室科技计划项目(YPML-2023050225); 创新团队项目(202405AS350024)
2025-01-08
2025
2025-01-20
2025
1
2026-02-25
2026-02-25