铝在原子氧环境中的腐蚀与防护

Corrosion and Protection of Aluminum in Atomic Oxygen Environment

目前,原子氧剥蚀效应研究仍然是空间环境效应研究中最活跃的方向之一。在概括地介绍低地球轨道环境的同时,分析了铝在原子氧环境中的氧化行为、氧化膜的形成机理和氧化铝膜的破裂等情况。基于离子溅射效应已经广泛应用在现代工业和科学研究中,分析当前溅射产额研究状况,采用半经验公式和TRIM程序计算铝被原子氧和离子氧轰击后的溅射产额和腐蚀速度,并与重离子He离子、Ar离子、Fe离子轰击Al的溅射产额比较;分析发现在原子氧环境中,离子对铝材料溅射同样满足溅射产额的变化规律;最后提出铝在原子氧环境中的防护方法。通过上述的分析和研究,得出了相关性的结论、展望和存在的问题。

At present, the study on atomic oxygen denudation effect is still one of the most active research fields on space environment effect. In this paper, the oxidation behavior of aluminum in the atomic oxygen environment of low-altitude earth orbit was analyzed, and the forming mechanism and rupture behavior of alumina were also investigated. Based on the wide use of ion sputtering effect in modern industry and scientific research, the current research state of sputtering yield was analyzed. The sputtering yield and corrosion rate resuhing from the impact of atomic oxygen and oxygen ions on Al materials were calculated by TRIM program and an empirical formula, and the results were compared with those resulting from the impact of He, Ar, and Fe ions on Al materials. The analysis results showed that the sputtering behavior of ions on Al materials accorded with the change law of sputtering yield in the atomic oxygen environment. Finally, some measures were proposed to protect aluminum from corrosion in the atomic oxygen environment. Based on the analyses and studies above, corresponding conclusions were drawn, and present problems and prospects were also discussed.