(1. 中國科學(xué)院金屬研究所 沈陽材料科學(xué)國家（聯(lián)合）實(shí)驗(yàn)室,
沈陽 110016;
2. 北京衛(wèi)星環(huán)境工程研究所, 北京 100029)
摘 要: 在原子氧地面模擬設(shè)備中對銅片、 Al2O3涂層試樣進(jìn)行了原子氧暴露實(shí)驗(yàn)， 采用XPS、 SEM等分析手段對暴露前后試樣表面的物理和化學(xué)變化進(jìn)行了研究。 結(jié)果表明: Cu受到原子氧的侵蝕， 質(zhì)量有少許增加， 表面形貌和電學(xué)性能有些變化；Al2O3涂層質(zhì)量變化很小，對基體提供了良好的保護(hù)作用。 XPS分析結(jié)果表明Cu表面形成CuO氧化物層。 反應(yīng)濺射的Al2O3涂層是富Al的， 初始暴露時(shí)由于氧化反應(yīng)而質(zhì)量有少許增加， 隨時(shí)間延長， 涂層變得完全符合化學(xué)計(jì)量。
關(guān)鍵字: 原子氧； 低地軌道； 銅； 防護(hù)涂層
TONG Jing-yu2， SUN Gang2
（1. Shenyang National Laboratory for Materials Science, Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016, China;
(2. Beijing Institute of Satellite Environment Engineering, Beijing 100029, China）
Abstract:Low earth orbit (LEO) space missions have been shown that ambient atomic oxygen (AO) environment interacts with spacecraft materials, resulting in surface erosion and significantly affecting the performance of the materials. To ensure durability, the spacecraft operating in the LEO requires protective coatings. The erosion behaviors of copper and Al2O3 coatings were studied when exposed in AO environment of the ground based simulation facility. The chemical and physical changes of sample surfaces after exposed to AO fluxes were investigated with X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The results indicate that copper undergoes slightly degradation, including mass gain and changes of surface morphology and electrical property; Al2O3 coatings have good AO erosion resistance, can provide protection for substrate materials. XPS analysis indicates that the surface of copper exposed to AO fluxes is composed mainly of CuO. Reactive sputtering prepared Al2O3 coatings are substoichiometric with an aluminum sufficiency, its mass increases at the initial stage of AO exposure, this is because of the transformation of substoichiometric to fully stoichiometric due to oxidation.
Key words: atomic oxygen； low earth orbit； copper； protective coating
