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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。
Iridium is the preferred material for the oxidation-resistant thermal shock coating of carbon / carbon composites above 1800 ° C in the aerospace field. In this paper, four methods of preparing iridium coatings, including physical vapor deposition, metalorganic chemical vapor deposition, molten salt electrolysis and double glow plasma deposition, are introduced. The transition between iridium coating and carbon / carbon composite matrix is discussed This paper summarizes the test results of ground commissioning of iridium coating, analyzes the factors that affect the service life of iridium coating, and points out that the technical approach of preparing iridium coating in our country should adopt Electroformed Deposition (ED) , Double-glow plasma deposition (DPD) method.