炭/炭复合材料抗氧化抗热震铱涂层的研究进展

铱是航天领域1800 ℃以上炭/炭复合材料抗氧化抗热震涂层的首选材料。本文介绍了物理气相沉积、金属有机物化学气相沉积、熔盐电解沉积和双层辉光等离子沉积等4种主要制备铱涂层的方法，讨论了铱涂层与炭/炭复合材料基体之间过渡层的材料选择，总结了铱涂层的地面试车测试结果，分析了影响铱涂层寿命的因素，指出今后我国制备铱涂层的技术途径应采用熔盐电解沉积 (Electroformed Deposition, 简写为ED)、双层辉光等离子沉积 (Double-glow Plasma Deposition, 简写为DPD)方法。

Progress in Study of Oxidation-Resistant and Thermal Shock-Resistant Iridium Coatings for Carbon/Carbon Composites

Iridium (Ir) is one of the most potential oxidation-resistant and thermal shock-resistant materials for carbon/carbon composites above 1800 oC in aerospace field. In this work, the current status of research of Ir coatings is reviewed. The main preparation methods, physical vapor deposition, metalorganic chemical vapor deposition, melting salt electroformed deposition and double-glow plasma deposition for the oxidation-resistant and thermal shock-resistant Ir coatings, are introduced. The interlayer between Ir coating and carbon/carbon composites which can increase bonding strength and match thermal stress is studied. The summary of engine test of Ir coatings is presented. The influencing factors of service time of Ir coatings are discussed. The practical techniques to prepare Ir coatings in China are put forward.