苯基硅橡胶热控涂层材料抗原子氧腐蚀能力的研究  

Study on the Resistance of Thermal Control Coating of Phenyl Silicone Rubber to Hyperthermal Atomic Oxygen Attack

作　　者：王黑龙 Murray J.Vanessa Minton K.Timothy 戴东旭[2] 武博涵 杨阳[5] 车丽[1,6] 

机构地区：[1]大连海事大学环境科学与工程学院,大连116026 [2]中国科学院大连化学物理研究所分子反应动力学国家重点实验室,大连116023 [3]蒙大拿州立大学化学与生物化学系,波兹曼59717 [4]北京卫星环境工程研究所,北京100094 [5]航天材料与工艺研究所,北京100076 [6]大连海事大学物理系,大连116026

出　　处：《宇航学报》2017年第6期662-668,共7页Journal of Astronautics

基　　金：国家自然科学基金(21473015;41574101);全国优秀博士学位论文作者专项资金(201222);中央高校基本科研业务费专项资金(3132017067)

摘　　要：为了评估材料的抗原子氧腐蚀能力,首先在地面模拟设备上通过激光爆破法产生平动能约为4.5 e V的原子氧束源,然后利用此高能氧束源对苯基硅橡胶热控涂层材料进行暴露实验。材料受高能原子氧轰击而导致的影响,分别通过质量、X射线光电子能谱和扫描电镜进行表征。结果显示,原子氧累积通量9.5×10^(19)atoms/cm^2及8.5×10^(20)atoms/cm^2暴露实验后,材料表面微观形貌没有明显腐蚀,质量有少许增加,表面化学组成发生明显变化,分析认为是形成非挥发性物质SiO_x。实验结果表明,苯基硅橡胶热控涂层材料具有优越的抗原子氧腐蚀能力,推测其机理是形成的SiO_x钝化层作为保护层对其下方的材料进行保护,阻止原子氧对材料进一步腐蚀。In order to assess the resistance ability of thermal control phenyl silicone rubber material to hyperthermal atomic oxygen, exposure experiments are carried out by use of an atomic oxygen beam with high kinetic energy of -4.5 eV, which is produced in a ground-based atomic oxygen simulation facility based on the laser-detonation method. Sample mass measurement, X-ray photoelectron spectroscopy, and scanning electron microscopy are performed prior to and after exposure, to evaluate the changes in the material morphology and chemistry caused by a hyperthermal atomic oxygen attack. Results indicate that after exposure with fluenees of 9. 5 × 1019 and 8. 5 ×1020 atoms cm-2, the surface morphology doesn＇ t show obvious sign of erosion, the sample mass increases a little bit, and the surface chemistry changes obviously with the formation of the nonvolatile SiOx. It can be concluded that the thermal control phenyl silicone rubber has good resistance ability and is durable under the bombardment of the hyperthermal atomic oxygen. The proposed mechanism is that the formed SiOx passivating layer acts as a protective layer protecting the underlying material from further erosion.

关 键 词：激光爆破 原子氧 苯基硅橡胶热控涂层 抗腐蚀 

分 类 号：V25[一般工业技术—材料科学与工程]