Kapton抗原子氧侵蚀的Al_2O_3涂层研究

Ground-based investigations of atomic oxygen erosion behaviors of Al_2O_3 coating on kapton

在原子氧侵蚀地面模拟设备中对 Kapton和利用反应溅射制备的 Al2 O3 涂层进行了原子氧暴露实验 ,并采用 XPS和 SEM等分析手段对暴露前后试样表面的物理和化学变化进行了研究。结果表明 ,Kapton试样遭受了严重的侵蚀 ,质量损失较大 ;Al2 O3 涂层质量变化很小 ,对基体提供了良好的保护作用。XPS分析结果表明 ,Kap-ton的羰基与原子氧作用时形成 CO2 ,随后 CO2 气体脱附。反应溅射的 Al2 O3 涂层是富 Al的 ,初始暴露时由于氧化反应而质量有少许增加 ,随时间延长 。

The erosion behaviors of Kapton and Al 2O 3 coating have been studied during exposure in atomic oxygen (AO) environment in the ground-based simulation facility.The variations of chemical and physical properties of sample surfaces after exposed to AO fluxes were investigated by X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM).The results indicate that Kapton undergoes dramatically degradation,including big mass loss and change of surface morphologies;Al 2O 3 coating has good AO erosion resistance,can provide protection for substrate materials.XPS analysis indicates that the carbonyl group in Kapton reacted with oxygen atoms to generate CO 2 which desorbed from Kapton surface.Prepared Al 2O 3 coating was unstoichiometric with an aluminum sufficiency,its mass increased at the initial stage of AO exposure,this is because of the transformation of substoichiometric to fully stoichiometric due to oxidation.