Energy Dependence of Hyperthermal Oxygen Atom Erosion of a Fluorocarbon Polymer: Relevance to Space Environmental Effects
Energy Dependence of Hyperthermal Oxygen Atom Erosion of a Fluorocarbon Polymer: Relevance to Space Environmental Effects
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DOI：
10.1021/am100201k
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发表时间：
2010-06
影响因子：
9.5
通讯作者：
M. Tagawa;K. Yokota;K. Kishida;A. Okamoto;T. Minton
中科院分区：
文献类型：
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作者：
M. Tagawa;K. Yokota;K. Kishida;A. Okamoto;T. Minton
研究了氟碳聚合物在地面原子氧试验环境和低地球轨道空间环境中腐蚀现象不一致的原因。为了研究氧原子束脉冲中的高能成分对腐蚀的影响，进行了详细的实验。实验是在激光爆轰原子氧实验装置上，采用石英晶体微天平和高速斩光轮相结合的方法进行的。人们清楚地观察到，聚酰亚胺和氟碳聚合物的质量损失率取决于原子氧的冲击能量。然而，与聚酰亚胺相比，氟碳聚合物的能量依赖性更显著。平移能量高于105eV的原子氧的碰撞在氟碳聚合物上引起显著的质量损失。这些实验结果与早期测量的挥发性产物释放过程中h…
The origin of the inconsistency in the erosion phenomena of fluorocarbon polymers between a ground-based atomic-oxygen test environment and the low Earth orbital space environment has been investigated. A detailed experiment was performed in order to study the effect of the high-energy component in the atomic-oxygen beam pulses on the erosion. The experiment was carried out with the combination of a polymer-coated quartz crystal microbalance and a high-speed chopper wheel installed in a laser-detonation atomic-oxygen facility. It was clearly observed that the mass-loss rates of both polyimide and fluorocarbon polymers depend on the impact energy of atomic oxygen. However, the energy dependence is more significant on the fluorocarbon polymer compared with that on polyimide. Collisions of atomic oxygen with translational energies higher than ∼5 eV induce a significant mass loss on the fluorocarbon polymer. These experimental findings agree with earlier measurements of the volatile products released during h...